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#logicofrelatives — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #logicofrelatives, aggregated by home.social.

  1. Sign Relations • Signs and Inquiry

    There is a close relationship between the pragmatic theory of signs and the pragmatic theory of inquiry.  In fact, the correspondence between the two studies exhibits so many congruences and parallels it is often best to treat them as integral parts of one and the same subject.  In a very real sense, inquiry is the process by which sign relations come to be established and continue to evolve.  In other words, inquiry, “thinking” in its best sense, “is a term denoting the various ways in which things acquire significance” (Dewey, 38).

    Tracing the passage of inquiry through the medium of signs calls for an active, intricate form of cooperation between the converging modes of investigation.  Its proper character is best understood by realizing the theory of inquiry is adapted to study the developmental aspects of sign relations, a subject the theory of signs is specialized to treat from comparative and structural points of view.

    References

    • Dewey, J. (1910), How We Think, D.C. Heath, Boston, MA.  Reprinted (1991), Prometheus Books, Buffalo, NY.  Online.
    • Awbrey, J.L., and Awbrey, S.M. (1995), “Interpretation as Action : The Risk of Inquiry”, Inquiry : Critical Thinking Across the Disciplines 15(1), pp. 40–52.  ArchiveJournal.  Online (doc) (pdf).

    Resources

    cc: Academia.eduLaws of FormResearch GateSyscoi
    cc: CyberneticsStructural ModelingSystems Science

    #CSPeirce #Connotation #Denotation #Inquiry #Logic #LogicOfRelatives #Mathematics #RelationTheory #Semiosis #SemioticEquivalenceRelations #Semiotics #SignRelations #TriadicRelations

  2. Sign Relations • Definition

    One of Peirce’s clearest and most complete definitions of a sign is one he gives in the context of providing a definition for logic, and so it is informative to view it in that setting.

    Logic will here be defined as formal semiotic.  A definition of a sign will be given which no more refers to human thought than does the definition of a line as the place which a particle occupies, part by part, during a lapse of time.  Namely, a sign is something, A, which brings something, B, its interpretant sign determined or created by it, into the same sort of correspondence with something, C, its object, as that in which itself stands to C.

    It is from this definition, together with a definition of “formal”, that I deduce mathematically the principles of logic.  I also make a historical review of all the definitions and conceptions of logic, and show, not merely that my definition is no novelty, but that my non‑psychological conception of logic has virtually been quite generally held, though not generally recognized.

    — C.S. Peirce, New Elements of Mathematics, vol. 4, 20–21

    In the general discussion of diverse theories of signs, the question arises whether signhood is an absolute, essential, indelible, or ontological property of a thing, or whether it is a relational, interpretive, and mutable role a thing may be said to have only within a particular context of relationships.

    Peirce’s definition of a sign defines it in relation to its objects and its interpretant signs, and thus defines signhood in relative terms, by means of a predicate with three places.  In that definition, signhood is a role in a triadic relation, a role a thing bears or plays in a determinate context of relationships — it is not an absolute or non‑relative property of a thing‑in‑itself, one it possesses independently of all relationships to other things.

    Some of the terms Peirce uses in his definition of a sign may need to be elaborated for the contemporary reader.

    • Correspondence.  From the way Peirce uses the term throughout his work, it is clear he means what he elsewhere calls a “triple correspondence”, and thus this is just another way of referring to the whole triadic sign relation itself.  In particular, his use of the term should not be taken to imply a dyadic correspondence, like the kinds of “mirror image” correspondence between realities and representations bandied about in contemporary controversies about “correspondence theories of truth”.
    • Determination.  Peirce’s concept of determination is broader in several directions than the sense of the word referring to strictly deterministic causal‑temporal processes.  First, and especially in this context, he is invoking a more general concept of determination, what is called a formal or informational determination, as in saying “two points determine a line”, rather than the more special cases of causal and temporal determinisms.  Second, he characteristically allows for what is called determination in measure, that is, an order of determinism admitting a full spectrum of more and less determined relationships.
    • Non‑psychological.  Peirce’s “non‑psychological conception of logic” must be distinguished from any variety of anti‑psychologism.  He was quite interested in matters of psychology and had much of import to say about them.  But logic and psychology operate on different planes of study even when they have occasion to view the same data, as logic is a normative science where psychology is a descriptive science, and so they have very different aims, methods, and rationales.

    Reference

    • Peirce, C.S. (1902), “Parts of Carnegie Application” (L 75), in Carolyn Eisele (ed., 1976), The New Elements of Mathematics by Charles S. Peirce, vol. 4, 13–73.  Online.

    Resources

    cc: Academia.eduLaws of FormResearch GateSyscoi
    cc: CyberneticsStructural ModelingSystems Science

    #CSPeirce #Connotation #Denotation #Inquiry #Logic #LogicOfRelatives #Mathematics #RelationTheory #Semiosis #SemioticEquivalenceRelations #Semiotics #SignRelations #TriadicRelations

  3. Survey of Semiotics, Semiosis, Sign Relations • 6

    C.S. Peirce defines logic as “formal semiotic”, using formal to highlight the place of logic as a normative science, over and above the descriptive study of signs and their role in wider fields of play.  Understanding logic as Peirce understands it thus requires a companion study of semiotics, semiosis, and sign relations.

    What follows is a Survey of blog and wiki resources on the theory of signs, variously known as semeiotic or semiotics, and the actions referred to as semiosis which transform signs among themselves in relation to their objects, all as based on C.S. Peirce’s concept of triadic sign relations.

    Elements

    Blog Series

    • Peircean Semiotics and Triadic Sign Relations • (1)(2)(3)

    Blog Dialogs

    Sources

    • C.S. Peirce • Algebra of Logic ∫ Philosophy of Notation • (1)(2)
    • C.S. Peirce • Algebra of Logic 1885 • Selections • (1)(2)(3)(4)

    Topics

    Excursions

    • Semiositis • (1)
    • Signspiel • (1)
    • Skiourosemiosis • (1)

    References

    • Awbrey, S.M., and Awbrey, J.L. (2001), “Conceptual Barriers to Creating Integrative Universities”, Organization : The Interdisciplinary Journal of Organization, Theory, and Society 8(2), Sage Publications, London, UK, 269–284.  AbstractOnline.
    • Awbrey, S.M., and Awbrey, J.L. (September 1999), “Organizations of Learning or Learning Organizations : The Challenge of Creating Integrative Universities for the Next Century”, Second International Conference of the Journal ‘Organization’, Re‑Organizing Knowledge, Trans‑Forming Institutions : Knowing, Knowledge, and the University in the 21st Century, University of Massachusetts, Amherst, MA.  Online.
    • Awbrey, J.L., and Awbrey, S.M. (1995), “Interpretation as Action : The Risk of Inquiry”, Inquiry : Critical Thinking Across the Disciplines 15(1), 40–52.  ArchiveJournal.  Online (doc) (pdf).
    • Awbrey, J.L., and Awbrey, S.M. (1992), “Interpretation as Action : The Risk of Inquiry”, The Eleventh International Human Science Research Conference, Oakland University, Rochester, Michigan.

    cc: FB | SemeioticsLaws of FormMathstodonOntologAcademia.edu
    cc: Conceptual GraphsCyberneticsStructural ModelingSystems Science

    #CSPeirce #IconIndexSymbol #Inquiry #Logic #LogicOfRelatives #Mathematics #RelationTheory #Semiosis #Semiotics #SignRelations #TriadicRelations #Triadicity #Visualization

  4. Peirce's 1885 “Algebra of Logic” • Discussion 2
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    One thing I've been trying to understand for a very long time is the changes in Peirce's writing about math and logic from 1865 to 1885. If there's anything I've learned from reading Peirce in the often dim light of intellectual history it is to be wary of progressivist assumptions — but unlike many of his other fans I apply that caution also within the body of his own work. Long story short, from 1865 to 1885 I see progress on several fronts but also bits of backsliding from his more prescient early insights. So it's a puzzle … and it will take more study to ravel out the reasons why.

    Resources for reconciling Peirce's two accounts —
    1. The 1870 account of logical involution
    2. The 1885 account of universal quantification

    Peirce's 1870 “Logic of Relatives” • Selection 12 • The Sign of Involution
    inquiryintoinquiry.com/2014/06
    Comments —
    (1) inquiryintoinquiry.com/2014/06
    (2) inquiryintoinquiry.com/2014/06
    (3) inquiryintoinquiry.com/2014/06
    (4) inquiryintoinquiry.com/2014/06
    (5) inquiryintoinquiry.com/2014/06

    Peirce's 1885 “Algebra of Logic” • Selections
    (1) inquiryintoinquiry.com/2024/03
    (2) inquiryintoinquiry.com/2024/03
    (3) inquiryintoinquiry.com/2024/03
    (4) inquiryintoinquiry.com/2024/04

    Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  5. Peirce's 1885 “Algebra of Logic” • Discussion 2
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    One thing I've been trying to understand for a very long time is the changes in Peirce's writing about math and logic from 1865 to 1885. If there's anything I've learned from reading Peirce in the often dim light of intellectual history it is to be wary of progressivist assumptions — but unlike many of his other fans I apply that caution also within the body of his own work. Long story short, from 1865 to 1885 I see progress on several fronts but also bits of backsliding from his more prescient early insights. So it's a puzzle … and it will take more study to ravel out the reasons why.

    Resources for reconciling Peirce's two accounts —
    1. The 1870 account of logical involution
    2. The 1885 account of universal quantification

    Peirce's 1870 “Logic of Relatives” • Selection 12 • The Sign of Involution
    inquiryintoinquiry.com/2014/06
    Comments —
    (1) inquiryintoinquiry.com/2014/06
    (2) inquiryintoinquiry.com/2014/06
    (3) inquiryintoinquiry.com/2014/06
    (4) inquiryintoinquiry.com/2014/06
    (5) inquiryintoinquiry.com/2014/06

    Peirce's 1885 “Algebra of Logic” • Selections
    (1) inquiryintoinquiry.com/2024/03
    (2) inquiryintoinquiry.com/2024/03
    (3) inquiryintoinquiry.com/2024/03
    (4) inquiryintoinquiry.com/2024/04

    Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  6. Peirce's 1885 “Algebra of Logic” • Discussion 2
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    One thing I've been trying to understand for a very long time is the changes in Peirce's writing about math and logic from 1865 to 1885. If there's anything I've learned from reading Peirce in the often dim light of intellectual history it is to be wary of progressivist assumptions — but unlike many of his other fans I apply that caution also within the body of his own work. Long story short, from 1865 to 1885 I see progress on several fronts but also bits of backsliding from his more prescient early insights. So it's a puzzle … and it will take more study to ravel out the reasons why.

    Resources for reconciling Peirce's two accounts —
    1. The 1870 account of logical involution
    2. The 1885 account of universal quantification

    Peirce's 1870 “Logic of Relatives” • Selection 12 • The Sign of Involution
    inquiryintoinquiry.com/2014/06
    Comments —
    (1) inquiryintoinquiry.com/2014/06
    (2) inquiryintoinquiry.com/2014/06
    (3) inquiryintoinquiry.com/2014/06
    (4) inquiryintoinquiry.com/2014/06
    (5) inquiryintoinquiry.com/2014/06

    Peirce's 1885 “Algebra of Logic” • Selections
    (1) inquiryintoinquiry.com/2024/03
    (2) inquiryintoinquiry.com/2024/03
    (3) inquiryintoinquiry.com/2024/03
    (4) inquiryintoinquiry.com/2024/04

    Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  7. Peirce's 1885 “Algebra of Logic” • Discussion 1
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    DE:
    ❝One of the most important papers in the history of logic. “On the Algebra of Logic” was the first to introduce the term “quantifier”.

    ❝Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    As far as quantification by any other word goes, Peirce had already introduced a more advanced and “functional” concept of quantification in his 1870 “Logic of Relatives”. The subsequent passage to Fregean styles of first order logic would turn out to be a retrograde movement toward syntacticism (a species of nominalism), as seen in the general run of what fol‑lowed in the fol‑lowing years.

    See ☞ Peirce's 1870 “Logic of Relatives”
    inquiryintoinquiry.com/2019/09

    Especially ☞ “The Sign of Involution”
    inquiryintoinquiry.com/2014/06

    The connection between logical involution and universal quantification which Peirce put to use in his 1870 Logic of Relatives will turn up again a century later with the application of category theory to computer science and both of those in turn to logic. Just one more time Peirce was that far ahead of it.

    See ☞ Lambek and Scott (1986), Introduction to Higher Order Categorical Logic, Cambridge University Press.
    oeis.org/wiki/User:Jon_Awbrey/

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  8. Peirce's 1885 “Algebra of Logic” • Discussion 1
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    DE:
    ❝One of the most important papers in the history of logic. “On the Algebra of Logic” was the first to introduce the term “quantifier”.

    ❝Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    As far as quantification by any other word goes, Peirce had already introduced a more advanced and “functional” concept of quantification in his 1870 “Logic of Relatives”. The subsequent passage to Fregean styles of first order logic would turn out to be a retrograde movement toward syntacticism (a species of nominalism), as seen in the general run of what fol‑lowed in the fol‑lowing years.

    See ☞ Peirce's 1870 “Logic of Relatives”
    inquiryintoinquiry.com/2019/09

    Especially ☞ “The Sign of Involution”
    inquiryintoinquiry.com/2014/06

    The connection between logical involution and universal quantification which Peirce put to use in his 1870 Logic of Relatives will turn up again a century later with the application of category theory to computer science and both of those in turn to logic. Just one more time Peirce was that far ahead of it.

    See ☞ Lambek and Scott (1986), Introduction to Higher Order Categorical Logic, Cambridge University Press.
    oeis.org/wiki/User:Jon_Awbrey/

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  9. Peirce's 1885 “Algebra of Logic” • Discussion 1
    inquiryintoinquiry.com/2024/04

    Re: FB | Daniel Everett

    DE:
    ❝One of the most important papers in the history of logic. “On the Algebra of Logic” was the first to introduce the term “quantifier”.

    ❝Peirce, C.S. (1885), “On the Algebra of Logic : A Contribution to the Philosophy of Notation”, American Journal of Mathematics 7, 180–202.
    jstor.org/stable/2369451

    As far as quantification by any other word goes, Peirce had already introduced a more advanced and “functional” concept of quantification in his 1870 “Logic of Relatives”. The subsequent passage to Fregean styles of first order logic would turn out to be a retrograde movement toward syntacticism (a species of nominalism), as seen in the general run of what fol‑lowed in the fol‑lowing years.

    See ☞ Peirce's 1870 “Logic of Relatives”
    inquiryintoinquiry.com/2019/09

    Especially ☞ “The Sign of Involution”
    inquiryintoinquiry.com/2014/06

    The connection between logical involution and universal quantification which Peirce put to use in his 1870 Logic of Relatives will turn up again a century later with the application of category theory to computer science and both of those in turn to logic. Just one more time Peirce was that far ahead of it.

    See ☞ Lambek and Scott (1986), Introduction to Higher Order Categorical Logic, Cambridge University Press.
    oeis.org/wiki/User:Jon_Awbrey/

    #Peirce #Logic #AlgebraOfLogic #LogicOfRelatives #RelationTheory #CategoryTheory
    #Semiotics #PredicateCalculus #Quantification #LogicalInvolution #ComputerScience

  10. Peirce's 1885 “Algebra of Logic” • Selection 1.1
    inquiryintoinquiry.com/2024/03

    ❝On the Algebra of Logic❞
    ❝A Contribution to the Philosophy of Notation❞

    ❝§1. Three Kinds Of Signs❞

    ❝Any character or proposition either concerns one subject, two subjects, or a plurality of subjects. For example, one particle has mass, two particles attract one another, a particle revolves about the line joining two others. A fact concerning two subjects is a dual character or relation; but a relation which is a mere combination of two independent facts concerning the two subjects may be called “degenerate”, just as two lines are called a degenerate conic. In like manner a plural character or conjoint relation is to be called degenerate if it is a mere compound of dual characters.

    ❝A sign is in a conjoint relation to the thing denoted and to the mind. If this triple relation is not of a degenerate species, the sign is related to its object only in consequence of a mental association, and depends upon a habit. Such signs are always abstract and general, because habits are general rules to which the organism has become subjected. They are, for the most part, conventional or arbitrary. They include all general words, the main body of speech, and any mode of conveying a judgment. For the sake of brevity I will call them “tokens”.❞ [Note. Peirce more frequently calls these “symbols”.]

    #Peirce #Logic #LogicOfRelatives #RelationTheory #RelativeTerm
    #MonadicRelation #DyadicRelation #TriadicRelation #SignRelation
    #AlgebraOfLogic #PredicateCalculus #Quantification #Semiotics
    #RelationComposition #RelationConstruction #RelationReduction

  11. Survey of Relation Theory
    inquiryintoinquiry.com/2024/03

    In the present Survey of blog and wiki resources for Relation Theory, relations are viewed from the perspective of combinatorics, in other words, as a topic in discrete mathematics, with special attention to finite structures and concrete set‑theoretic constructions, many of which arise quite naturally in applications. This approach to relation theory is distinct from, though closely related to, its study from the perspectives of abstract algebra on the one hand and formal logic on the other.

    Please follow the above link for the full set of resources.
    A few basic articles are linked below.

    Relation Theory
    oeis.org/wiki/Relation_theory

    Relation Composition
    oeis.org/wiki/Relation_composi

    Relation Construction
    oeis.org/wiki/Relation_constru

    Relation Reduction
    oeis.org/wiki/Relation_reducti

    Relative Term
    oeis.org/wiki/Relative_term

    Sign Relation
    oeis.org/wiki/Sign_relation

    Triadic Relation
    oeis.org/wiki/Triadic_relation

    Six Ways of Looking at a Triadic Relation ⌬ 1
    inquiryintoinquiry.com/2015/02

    Mathematical Demonstration and the Doctrine of Individuals
    inquiryintoinquiry.com/2023/05
    inquiryintoinquiry.com/2023/05

    Peirce's 1870 “Logic of Relatives” —
    inquiryintoinquiry.com/2019/09
    inquiryintoinquiry.com/2014/01

    #Peirce #Logic #LogicOfRelatives #RelationTheory #RelativeTerm
    #MonadicRelation #DyadicRelation #TriadicRelation #SignRelation
    #PredicateCalculus #ContinuousPredicate #HypostaticAbstraction
    #RelationComposition #RelationConstruction #RelationReduction

  12. Survey of Relation Theory
    inquiryintoinquiry.com/2023/07

    In this Survey of blog and wiki posts on Relation Theory, relations are viewed from the perspective of combinatorics, in other words, as a topic in discrete mathematics, with special attention to finite structures and concrete set‑theoretic constructions, many of which arise quite naturally in applications. This approach to relation theory is distinct from, though closely related to, its study from the perspectives of abstract algebra on the one hand and formal logic on the other.

    Please follow the above link for the full set of resources.
    A few basic articles are linked below.

    Elements —
    • Relation Theory ( oeis.org/wiki/Relation_theory )

    Relational Concepts —
    • Relation Composition ( oeis.org/wiki/Relation_composi )
    • Relation Construction ( oeis.org/wiki/Relation_constru )
    • Relation Reduction ( oeis.org/wiki/Relation_reducti )
    • Relative Term ( oeis.org/wiki/Relative_term )
    • Sign Relation ( oeis.org/wiki/Sign_relation )
    • Triadic Relation ( oeis.org/wiki/Triadic_relation )
    • Logic of Relatives ( oeis.org/wiki/Logic_of_relativ )
    • Hypostatic Abstraction ( oeis.org/wiki/Hypostatic_abstr )
    • Continuous Predicate ( oeis.org/wiki/Continuous_predi )

    Illustrations —

    Six Ways of Looking at a Triadic Relation ⌬ 1
    inquiryintoinquiry.com/2015/02

    Information‑Theoretic Perspective (Escape from Nominalism)

    • Mathematical Demonstration and the Doctrine of Individuals
    inquiryintoinquiry.com/2023/05
    inquiryintoinquiry.com/2023/05

    Peirce's 1870 “Logic of Relatives” —

    Overview
    inquiryintoinquiry.com/2019/09

    Preliminaries
    inquiryintoinquiry.com/2014/01

    #Peirce #Logic #LogicOfRelatives #RelationTheory #RelativeTerm
    #MonadicRelation #DyadicRelation #TriadicRelation #SignRelation
    #RelationComposition #RelationConstruction #RelationReduction

  13. Survey of Relation Theory
    inquiryintoinquiry.com/2023/04

    In this Survey of blog and wiki posts on Relation Theory, relations are viewed from the perspective of combinatorics, in other words, as a topic in discrete mathematics, with special attention to finite structures and concrete set-theoretic constructions, many of which arise quite naturally in applications. This approach to relation theory is distinct from, though closely related to, its study from the perspectives of abstract algebra on the one hand and formal logic on the other.

    Please follow the above link for the full set of resources.
    A few basic articles are linked below.

    Elements —
    • Relation Theory ( oeis.org/wiki/Relation_theory )

    Relational Concepts —
    • Relation Construction ( oeis.org/wiki/Relation_constru )
    • Relation Composition ( oeis.org/wiki/Relation_composi )
    • Relation Reduction ( oeis.org/wiki/Relation_reducti )
    • Relative Term ( oeis.org/wiki/Relative_term )
    • Sign Relation ( oeis.org/wiki/Sign_relation )
    • Triadic Relation ( oeis.org/wiki/Triadic_relation )
    • Logic of Relatives ( oeis.org/wiki/Logic_of_relativ )
    • Hypostatic Abstraction ( oeis.org/wiki/Hypostatic_abstr )
    • Continuous Predicate ( oeis.org/wiki/Continuous_predi )

    Illustrations —

    Six Ways of Looking at a Triadic Relation ⌬ 1
    inquiryintoinquiry.com/2015/02

    Peirce's 1870 “Logic of Relatives” —

    Overview
    inquiryintoinquiry.com/2019/09

    Preliminaries
    inquiryintoinquiry.com/2014/01

    #Peirce #Logic #LogicOfRelatives #RelationTheory #RelativeTerm
    #MonadicRelation #DyadicRelation #TriadicRelation #SignRelation
    #PredicateCalculus #ContinuousPredicate #HypostaticAbstraction
    #RelationComposition #RelationConstruction #RelationReduction

  14. Peirce's 1870 “Logic of Relatives” • Selection 3.2
    inquiryintoinquiry.com/2014/01

    ❝§3. Application of the Algebraic Signs to Logic❞

    ❝The Signs of Inclusion, Equality, Etc.❞

    ❝But not only do the significations of \(=\) and \(<\) here adopted fulfill all absolute requirements, but they have the supererogatory virtue of being very nearly the same as the common significations. Equality is, in fact, nothing but the identity of two numbers; numbers that are equal are those which are predicable of the same collections, just as terms that are identical are those which are predicable of the same classes.

    ❝So, to write \(5 < 7\) is to say that \(5\) is part of \(7,\) just as to write \(\mathrm{f} < \mathrm{m}\) is to say that Frenchmen are part of men. Indeed, if \(\mathrm{f} < \mathrm{m},\) then the number of Frenchmen is less than the number of men, and if \(\mathrm{v} = \mathrm{p},\) then the number of Vice-Presidents is equal to the number of Presidents of the Senate; so that the numbers may always be substituted for the terms themselves, in case no signs of operation occur in the equations or inequalities.❞

    (Peirce, CP 3.66)

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  15. Peirce's 1870 “Logic of Relatives” • Selection 2.1
    inquiryintoinquiry.com/2014/01

    ❝§3. Application of the Algebraic Signs to Logic❞

    ❝Numbers Corresponding to Letters❞

    ❝I propose to use the term “universe” to denote that class of individuals about which alone the whole discourse is understood to run. The universe, therefore, in this sense, as in Mr. De Morgan's, is different on different occasions. In this sense, moreover, discourse may run upon something which is not a subjective part of the universe; for instance, upon the qualities or collections of the individuals it contains.

    ❝I propose to assign to all logical terms, numbers; to an absolute term, the number of individuals it denotes; to a relative term, the average number of things so related to one individual. Thus in a universe of perfect men \((\mathrm{men}),\) the number of “tooth of” would be 32. The number of a relative with two correlates would be the average number of things so related to a pair of individuals; and so on for relatives of higher numbers of correlates. I propose to denote the number of a logical term by enclosing the term in square brackets, thus, \([t].\)❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  16. Peirce's 1870 “Logic of Relatives” • Selection 1.2
    inquiryintoinquiry.com/2014/01

    ❝The conjugative term involves the conception of third, the relative that of second or other, the absolute term simply considers an object. No fourth class of terms exists involving the conception of fourth, because when that of third is introduced, since it involves the conception of bringing objects into relation, all higher numbers are given at once, inasmuch as the conception of bringing objects into relation is independent of the number of members of the relationship. Whether this reason for the fact that there is no fourth class of terms fundamentally different from the third is satisfactory of not, the fact itself is made perfectly evident by the study of the logic of relatives.❞

    One thing that strikes me about the above passage is a pattern of argument I can recognize as invoking a closure principle. This is a figure of reasoning Peirce uses in three other places: his discussion of continuous predicates, his definition of a sign relation, and his formulation of the pragmatic maxim itself.

    One might also call attention to the following two statements:

    ❝Now logical terms are of three grand classes.❞

    ❝No fourth class of terms exists involving the conception of fourth, because when that of third is introduced, since it involves the conception of bringing objects into relation, all higher numbers are given at once, inasmuch as the conception of bringing objects into relation is independent of the number of members of the relationship.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  17. Peirce's 1870 “Logic of Relatives” • Selection 1.1
    inquiryintoinquiry.com/2014/01

    We pick up Peirce's text at the following point.

    ❝§3. Application of the Algebraic Signs to Logic❞

    ❝Use of the Letters❞

    ❝The letters of the alphabet will denote logical signs.

    ❝Now logical terms are of three grand classes.

    ❝The first embraces those whose logical form involves only the conception of quality, and which therefore represent a thing simply as “a ──”. These discriminate objects in the most rudimentary way, which does not involve any consciousness of discrimination. They regard an object as it is in itself as such (quale); for example, as horse, tree, or man. These are absolute terms.

    ❝The second class embraces terms whose logical form involves the conception of relation, and which require the addition of another term to complete the denotation. These discriminate objects with a distinct consciousness of discrimination. They regard an object as over against another, that is as relative; as father of, lover of, or servant of. These are simple relative terms.

    ❝The third class embraces terms whose logical form involves the conception of bringing things into relation, and which require the addition of more than one term to complete the denotation. They discriminate not only with consciousness of discrimination, but with consciousness of its origin. They regard an object as medium or third between two others, that is as conjugative; as giver of ── to ──, or buyer of ── for ── from ──. These may be termed conjugative terms.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  18. Peirce's 1870 “Logic of Relatives” • Preliminaries 5
    • inquiryintoinquiry.com/2014/01

    Individual terms are taken to denote individual entities falling under a general term. Peirce uses upper case Roman letters for individual terms, for example, the individual horses \(\mathrm{H}, \mathrm{H}^{\prime}, \mathrm{H}^{\prime\prime}\) falling under the general term \(\mathrm{h}\) for horse.

    The path to understanding Peirce's system and its wider implications for logic can be smoothed by paraphrasing his notations in a variety of contemporary mathematical formalisms, while preserving the semantics as much as possible. Remaining faithful to Peirce's orthography while adding parallel sets of stylistic conventions will, however, demand close attention to typography-in-context.

    Current style sheets for mathematical texts specify italics for mathematical variables, with upper case letters for sets and lower case letters for individuals. So we need to keep an eye out for the difference between the individual \(\mathrm{X}\) of the genus \(\mathrm{x}\) and the element \(x\) of the set \(X\) as we pass between the two styles of text.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  19. Peirce's 1870 “Logic of Relatives” • Preliminaries 4
    • inquiryintoinquiry.com/2014/01

    Conjugative Terms (Higher Adic Relatives)
    • inquiryintoinquiry.files.wordp

    The Table displays the single-letter abbreviations and their verbal equivalents for the “conjugative terms” (or “higher adic relative terms”) used in Peirce's examples of logical formulas. Peirce used a distinctive typeface for the abbreviations of higher adic relative terms, rendered here as LaTeX “mathfrak”, Fraktur, or Gothic.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  20. Peirce's 1870 “Logic of Relatives” • Preliminaries 3
    • inquiryintoinquiry.com/2014/01

    Simple Relative Terms (Dyadic Relatives)
    • inquiryintoinquiry.files.wordp

    The Table displays the single-letter abbreviations and their verbal equivalents for the “simple relative terms” (or “dyadic relative terms”) used in Peirce's examples of logical formulas. Peirce used a distinctive typeface for the abbreviations of dyadic relative terms, rendered here as LaTeX “mathit” or Italics.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  21. Peirce's 1870 “Logic of Relatives” • Preliminaries 2
    • inquiryintoinquiry.com/2014/01

    Absolute Terms (Monadic Relatives)
    • inquiryintoinquiry.files.wordp

    The Table displays the single-letter abbreviations and their verbal equivalents for the “absolute logical terms” (or “monadic relative terms”) used in Peirce's examples of logical formulas throughout the rest of the paper. Peirce used a distinctive typeface for the absolute term abbreviations, rendered here as LaTeX “mathrm” or Roman.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  22. Peirce's 1870 “Logic of Relatives” • Preliminaries 1
    • inquiryintoinquiry.com/2014/01

    In the beginning was the three-pointed star,
    One smile of light across the empty face;
    One bough of bone across the rooting air,
    The substance forked that marrowed the first sun;
    And, burning ciphers on the round of space,
    Heaven and hell mixed as they spun.

    #DylanThomas#InTheBeginning

    Peirce’s text uses lower case letters for logical terms of general reference and upper case letters for logical terms of individual reference. General terms fall into types, namely, absolute terms, dyadic relative terms, and higher adic relative terms, which Peirce distinguishes through the use of different typefaces. The following Tables show the typefaces used in the present transcript for Peirce's examples of general terms. (I'll post just the image links for now, then the full images and texts in the next three posts.)

    Absolute Terms (Monadic Relatives)
    • inquiryintoinquiry.files.wordp

    Simple Relative Terms (Dyadic Relatives)
    • inquiryintoinquiry.files.wordp

    Conjugative Terms (Higher Adic Relatives)
    • inquiryintoinquiry.files.wordp

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  23. Peirce’s 1870 “Logic of Relatives” • Overview
    inquiryintoinquiry.com/2019/09

    My long ago encounter with Peirce’s 1870 paper, “Description of a Notation for the Logic of Relatives, Resulting from an Amplification of the Conceptions of Boole’s Calculus of Logic”, was one of the events precipitating my return from the hazier heights of philosophy to the solid plains of mathematics below. Over the years I copied out various drafts of my study notes to the web, consisting of selections from Peirce’s paper along with my running commentary. A few years back I serialized what progress I had made so far to this blog and this Overview consists of links to those installments.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs
    #PropositionalCalculus #PredicateCalculus #CategoryTheory

  24. Peirce's 1870 “Logic of Relatives” • Selection 1.8
    • inquiryintoinquiry.com/2014/01

    ❝Whether this “reason” for the fact that there is no fourth class of terms fundamentally different from the third is satisfactory of not, the fact itself is made perfectly evident by the study of the logic of relatives.❞

    (Peirce, CP 3.63)

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  25. Peirce's 1870 “Logic of Relatives” • Selection 1.6
    • inquiryintoinquiry.com/2014/01

    ❝The conjugative term involves the conception of “third”, the relative that of second or “other”, the absolute term simply considers “an” object.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  26. Peirce's 1870 “Logic of Relatives” • Selection 1.5
    • inquiryintoinquiry.com/2014/01

    ❝They discriminate not only with consciousness of discrimination, but with consciousness of its origin. They regard an object as medium or third between two others, that is as conjugative; as giver of ── to ──, or buyer of ── for ── from ──. These may be termed conjugative terms.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  27. Peirce's 1870 “Logic of Relatives” • Selection 1.4
    • inquiryintoinquiry.com/2014/01

    ❝The third class embraces terms whose logical form involves the conception of bringing things into relation, and which require the addition of more than one term to complete the denotation.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  28. Peirce's 1870 “Logic of Relatives” • Selection 1.1
    • inquiryintoinquiry.com/2014/01

    We pick up Peirce's text at the following point.

    ❝§3. Application of the Algebraic Signs to Logic❞

    ❝Use of the Letters❞

    ❝The letters of the alphabet will denote logical signs.❞

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  29. Peirce's 1870 “Logic of Relatives” • Preliminaries 7
    • inquiryintoinquiry.com/2014/01

    Individual terms are taken to denote individual entities falling under a general term. Peirce uses upper case Roman letters for individual terms, for example, the individual horses \(\mathrm{H}, \mathrm{H}^{\prime}, \mathrm{H}^{\prime\prime}\) falling under the general term \(\mathrm{h}\) for horse.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  30. Peirce's 1870 “Logic of Relatives” • Preliminaries 1
    • inquiryintoinquiry.com/2014/01

    In the beginning was the three-pointed star,
    One smile of light across the empty face;
    One bough of bone across the rooting air,
    The substance forked that marrowed the first sun;
    And, burning ciphers on the round of space,
    Heaven and hell mixed as they spun.

    #DylanThomas#InTheBeginning

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  31. Peirce’s 1870 “Logic of Relatives” • Overview
    inquiryintoinquiry.com/2019/09

    Over the years I copied out various drafts of my study notes to the web, consisting of selections from Peirce’s paper along with my running commentary. A few years back I serialized what progress I had made so far to this blog and this Overview consists of links to those installments.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  32. Peirce’s 1870 “Logic of Relatives” • Overview
    inquiryintoinquiry.com/2019/09

    My long ago encounter with Peirce’s 1870 paper, “Description of a Notation for the Logic of Relatives, Resulting from an Amplification of the Conceptions of Boole’s Calculus of Logic”, was one of the events precipitating my return from the hazier heights of philosophy to the solid plains of mathematics below.

    #Peirce #Logic #LogicOfRelatives #RelationTheory #LOR1870
    #Boole #LogicalCalculus #MathematicalLogic #LogicalGraphs

  33. @hochstenbach @josd

    I signed on to the group and list. I don't know if you'd be interested in a side- or sub-project focusing on the propositional layer as I have done some work on #Peirce's #AlphaGraphs and his #LogicOfRelatives.

  34. Hypostatic Abstraction

    The Care and Breeding of Abstract Objects

    Hypostatic Abstraction is a formal operation on a subject–predicate form which preserves its information while introducing a new subject and upping the “arity” of its predicate.  To cite a notorious example, hypostatic abstraction turns “Opium is drowsifying” into “Opium has dormitive virtue”.

    Introduction

    Hypostatic abstraction is a formal operation which takes an element of information, as expressed in a proposition and conceives its information to consist in the relation between that subject and another subject, as expressed in the proposition   The existence of the abstract subject consists solely in the truth of those propositions containing the concrete predicate   Hypostatic abstraction is known under many names, for example, hypostasis, objectification, reification, and subjectal abstraction.  The object of discussion or thought thus introduced is termed a hypostatic object.

    The above definition is adapted from the one given by Charles Sanders Peirce (CP 4.235, “The Simplest Mathematics” (1902), in Collected Papers, CP 4.227–323).

    The way that Peirce describes it, the main thing about the formal operation of hypostatic abstraction, insofar as it can be observed to operate on formal linguistic expressions, is that it converts some part of a predicate into a number of additional subjects, at the same time creating a new predicate that tells how all of the subjects are related, at least, according to the information in the original proposition.

    For example, a typical case of hypostatic abstraction occurs in the grammatical transformation which turns “honey is sweet” into “honey possesses sweetness”.  This transformation may be visualized in the following variety of ways.

    The grammatical trace of the hypostatic transformation occurring in this case articulates a process that abstracts the adjective “sweet” from the main predicate “is sweet”, thus arriving at a new, increased-arity predicate “possesses”, and as a by-product of the reaction, as it were, precipitating out the substantive “sweetness” as a second subject of the new 2-place predicate, “possesses”.

    References

    • Peirce, C.S., Collected Papers of Charles Sanders Peirce, vols. 1–6, Charles Hartshorne and Paul Weiss (eds.), vols. 7–8, Arthur W. Burks (ed.), Harvard University Press, Cambridge, MA, 1931–1935, 1958.

    Resources

    #Abstraction #Article #CSPeirce #HypostaticAbstraction #Logic #LogicOfRelatives #LogicalGraphs #Mathematics #Molière #Peirce #Reification #RelationTheory