Presocratics

Presocratics - What it's Like to Be Ancient Is...

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What it’s Like to Be Ancient Is Perception “Top Down”? The picture is ambiguous Is perception merely reception of  pure information? Or is it really “interpretation” or  “inference” based on our  background beliefs and attitudes?
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Or Is Perception Bottom Up? The square  is stationary! The light source (and shadow) moves Do we initially see the square as moving because  we believe that the light source is stationary and  infer that the square must be moving?  Does the persistence of the illusion show that  perception is independent of what we know?
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The Mask We know that the nose in  the mask  does not  change Nevertheless, we see it as changing Does this show that perception is not influenced  by knowledge?
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Stationary  Spirals  in Motion Here’s another image that suggests that perception  is bottom-up The observer knows that the  spirals  are stationary Nevertheless, they seem to move and change while  under observation
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Change Blindness See the work of Daniel Simons at http://viscog.beckman.uiuc.edu/djs_lab/demos.html Especially  http://viscog.beckman.uiuc.edu/grafs/demos/15.html
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What’s the Moral of the Story? If perception is top down, then how the ancients  saw their world may have differed from the way  we see our world Perception and Knowledge can conflict (The mask  and the square) When should we trust perception?
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Early Ancient Greek Philosophers and  Questions 2000 Years Before Science Is the physical universe orderly or random? Some change appears regular; some does not.  Why? Is the universe determined by capricious gods or  something fixed, constant and knowable?
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Ancient Philosophy and the Quest for  Knowledge Ancient Greece (map)   Presocratics = Ancient Greek Philosophers (600-470 bc)  who lived before the time of Socrates (470-399 bc) Some Presocratics accept the reality of observable and  orderly change; others deny it Some Presocratics are skeptical regarding perception
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Presocratics Who Affirm the Reality  and Intelligibility of Change
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Presocratics - What it's Like to Be Ancient Is...

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