#paradoxes — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #paradoxes, aggregated by home.social.
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#KnowledgeByte: #Visual #Paradoxes in human vision occur when our brains receive accurate sensory data but interpret it in a way that is logically inconsistent or physically impossible.
These range from biological "glitches" in how the eye ages to cognitive tricks like impossible objects.
https://knowledgezone.co.in/posts/Paradoxes-Of-Human-Vision-69d8f967e4c74c77036fb7a4
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Zeno of Elea: The Philosopher Who Broke Motion
The Devoted Student Born around 490 BCE in Elea (southern Italy), Zeno of Elea was the loyal defender of his teacher Parmenides. Parmenides claimed reality is one, eternal, and unchanging—that all motion and change are illusions. While others mocked this, Zeno set out to prove the opposite: that believing in "common sense" (motion and plurality) leads to logical contradictions even worse than Parmenides' claims.
The Weapon: Reductio ad Absurdum Zeno perfected reductio ad absurdum: taking an opponent's view and showing it leads to impossibility. He constructed roughly forty paradoxes; only a few survive, but they have puzzled thinkers for 2,500 years.
The Paradoxes of Plurality Zeno argued that if many things exist, they must be divisible. If you divide something endlessly, you either reach parts with zero size (making the whole size zero) or parts with finite size (making the whole infinitely large). Both are absurd. Thus, "many things" cannot exist. This anticipates modern debates about atoms and the Planck length.
The Paradoxes of Motion
The Dichotomy: To walk across a room, you must first go halfway. But before that, a quarter-way. There is no "first" step because there is always a prior midpoint. You must complete an infinite number of tasks to start moving—a logical impossibility.
Achilles and the Tortoise: The swift Achilles cannot overtake a slow tortoise with a head start. By the time Achilles reaches where the tortoise was, the tortoise has moved further. The gap shrinks infinitely but never closes.
The Arrow: At any single instant, an arrow occupies a specific spot. Since an instant has no duration, the arrow cannot move during it. If time is made of instants, and the arrow is still at every instant, when does it move?
The Stadium: Moving objects in opposite directions create contradictions about relative speed and time, hinting at issues later addressed by Einstein.
Legacy Zeno didn't just pose puzzles; he drove the development of calculus (to handle infinite series), refined logic, and forced physics to confront the nature of space and time. Even today, quantum mechanics (discrete quanta) and relativity (spacetime) grapple with the questions he raised. He taught us that reality is stranger than it appears and that "obvious" truths deserve the hardest scrutiny.
listen to the lecture: https://tube.leshley.ca/w/7gReepAhkyspTHRtj1wrWi
#ZenoOfElea #Paradoxes #AncientPhilosophy #GreekPhilosophy #Philosophy -
Priest, Tanaka, and Weber have revised their SEP-entry on paraconsistent logic, https://plato.stanford.edu/entries/logic-paraconsistent/
#sep #paraconsistent #explosive #logic #philosophy #logiikka #filosofia #matematiikka #mathematics #paradoxes #beliefs #dialetheism #consistency #inconsistency
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Friendly reminder!
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The #Art of #Mathematical #Paradoxes: A Journey Through the #Weirdest Ideas : Medium
If You Say Yes to Any of These 5 Questions, #Science Says You’re More #EmotionallyIntelligent Than You Think: Misc
#Microsoft says #AI can create “zero day” #Threats in #Biology : Tech Review
Check our latest #KnowledgeLinks
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Time travel is self-suppressing
https://arxiv.org/abs/2508.09157
#HackerNews #Time #travel #self-suppression #science #fiction #paradoxes #timeparadox #theory
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Well, luckily your household is one of the best-equipped to handle such paradoxes. 😉
Paradoxi?
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The Most Mind-Bending Paradoxes in Math and Physics
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4 #Paradoxes That Will Expand Your #Thinking : Medium
Why your next #Flight could be a lot #Bumpier : Misc
#World #Fertility rates in '#Unprecedented decline', #UN says : BBC
Check our latest #KnowledgeLinks
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🎬 🔥 Live content alert! @hatnix is streaming on Owncast: https://live.hatnix.net/
#paradoxes #doorsofperdition #puzzlemaster #logicpuzzles #owncast #livestream #stream #selfhosted
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#Thought #Experiment: What-if multiple stars are the same #star in different #times?Disregarding our familiar #paradoxes for a moment, if Time Travel is possible, then mightn't it occur in #Nature? And if-then, how could one know? What evidence should we be looking for? Something duplicated: #stars, #galaxies, #quanta, #identicaltwins, #groundhogday, #Castor & #Pollux. 🌠🌠
🔗 https://Wikipedia.org/wiki/Castor_and_Pollux
🔗 https://Wikipedia.org/wiki/Castor_(star)
🔗 https://Wikipedia.org/wiki/Pollux_(star) -
How come we seem to be unable to internally recruit an expert about a topic to join the hiring committee for an open position on exactly that topic?
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Could #Tachyons Exist? Breaking the #SpeedOfLight
❛❛ a popular notion floated around by proponents of Tachyons is that Tachyons could be used to transmit #signals back in time, which opens up the door to some interesting #paradoxes. ❜❜
🔗 https://www.youtube.com/watch?v=Eu1a9zXyswc 2023 May 21
🔗 https://Wikipedia.org/wiki/Tachyon
🔗 https://Wikipedia.org/wiki/Gerald_Feinberg#Time #Timelessness #TimeTravel #quantum #physics #tachyon #particle #relativity #spacetime #KrononautMoon
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Aton Petrov: Time Travel May Be Possible Without Major #Paradoxes
Short 12-min #video on the #cultural & #literary #history and #theoretical #physics of Time Travel. Thinking on the subject rapidly generates paradoxes of #mathematical #logic, which #Petrov says cannot exist.
🔗 https://www.youtube.com/watch?v=p2uWv02-BlA 02 May 2022
🔗 https://Wikipedia.org/wiki/Temporal_paradox#Time #Timelessness #TimeTravel #theory #manyworlds #multiverse #causality #philosophy #spacetime #KrononautMoon
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Can We Go Back in Time [ie, Retrograde] Using a #SpaceTime #Machine?
10 minutes of Neil deGrasse Tyson & some sophisticated animations depicting the possibilities, problems & #paradoxes of #TimeTravel.
🔗 https://www.youtube.com/watch?v=yI9IL9pNcpg 10 Dec 2022
🔗 https://en.wikipedia.org/wiki/Neil_deGrasse_TysonThe #Krononaut #Moon Project celebrates Time Travel on the Night of the Total Lunar Eclipse, coming our way twice in 2025 — on Mar 14 & on Sep 07.
#Time #Timelessness #TimeTravelResearch #neildegrassetyson #physics #science
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The Time Traveler's Wife
Clip from the thought provoking and romantic movie from 2009 based on Audrey Niffeneggar's 2003 novel. Henry (Eric Bana) meets Claire (Rachel McAdams) and she decides to stay with him, despite his random disappearances & reappearances.
🔗 https://www.youtube.com/watch?v=BdC4os4SOH0
🔗 https://en.wikipedia.org/wiki/The_Time_Traveler%27s_Wife_(film)#Time #Timelessness #TimeTravel #movie #film #fiction #scifi #romance #paradoxes
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PARADOXES DES RÉCITS DE TRANSFUGES DE CLASSE
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"Is Time Travel Possible in our #Universe?"One of the better explainers we've seen on #TimeTravel's mainstream #scientific & #philosophical promises & problems, for ordinary #Earthlings (despite a couple #ads). In the first 4 mins we are introduced to 5 classic #Paradoxes: The #Bootstrap, #Restoration, #ExNihilo, #Predestination & #Autoinfanticide, with everyone's famous #Grandfather showing up later. #Krono-recommended!
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"Is Time Travel, Especially Into the Past, Possible?"
#experimental #astroparticle #physicist Matt Szydagis speaking at #TEDx #Schenectady #NY #USDiscussing a range of possibilities & problems of #TimeTravel, emphasizing the #paradoxes, #Einstein, and #quantummechanics. No mention of #entanglement. Agrees that our understanding should include #subatomic particles as #message carriers.
🔗 https://youtube.com/watch?v=m2-I5HUwfRg 16 Jan 2018
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"Why Time Travel is Impossible"
by RealLifeLorePresents brief descriptions of the classic #Grandfather & #Bootstrap #Paradoxes.
Such #thoughtexperiments give rise to apparently illogical scenarios, including the #HitlerParadox, also mentioned. Although, none absolutely nullifies all possibility of #interdimensional transport. #Video is ~ 7 mins long with a sponsored ad beginning at ~ 6 mins (and 12k+ comments!) -
https://www.wacoca.com/videos/2061730/voice-actress/ 富田美憂 / Paradoxes(TVアニメ「デート・ア・ライブV」オープニング・テーマ) #Paradoxes #ParadoxesTVアニメデートアライブVオープニングテーマ #TVアニメ #UC7RMi15o0aQacJhxOc6LLmw #Vlog #VoiceActress #アミューズ #オープニング・テーマ #オープニングテーマ #デート・ア・ライブV #デートアライブV #とみたみゆ #パラドキシーズ #冨田美憂 #声優 #女性声優 #富田美憂
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Gray's paradox (Zoology 🦥)
Gray's Paradox is a paradox posed in 1936 by British zoologist Sir James Gray. The paradox was to figure out how dolphins can obtain such high speeds and accelerations with what appears to be a small muscle mass. Gray made an estimate of the power a dolphin could exert based on its physiology, and concluded the power was insufficient to overcome the drag forces...
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10 paradoxes. You may recognize a few of them. https://archive.ph/IaBat
#science #weird #paradoxes #space #time #physics #BlackHoles #Fermi #Hawking #Catch22 #tolerance #intolerance #hedonism #Peto #MontyHall
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"Why, sometimes I've believed as many as six impossible things before breakfast." The White Queen
https://youtube.com/shorts/9ZKVgp9Cqzw
#magick #philosophy #contradictions #paradoxes #esotericism -
#GregoryBenford - What's Real About #Time?
https://www.youtube.com/watch?v=sJ7UzrrJkMg&ab_channel=CloserToTruth
#Philosophy #PhilosophyOfScience #PhilosophyOfTime #NatureOfTime #TimeTravel #Paradox #Paradoxes #Causality #Information #QM #QuantumMechanics #QuantumPhysics #Metaphysics #Multiverse #CloserToTruth #RobertKuhn
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Arrow's impossibility theorem
Arrow's impossibility theorem, the general possibility theorem or Arrow's paradox is an impossibility theorem in social choice theory that states that when voters have three or more distinct alternatives (options), no ranked voting electoral system can convert the ranked preferences…
https://en.m.wikipedia.org/wiki/Arrow%27s_impossibility_theorem
