How do you see "1" in depth? 1. Left: convex, right: convex 2. Left: convex, right: concave 3. Left: concave, right: convex 4. Left: concave, right: concave (Japanese 1 yen coin)pic.twitter.com/l7s2SXt9Yo
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Thank you. It's amazing to see how easily our mind can be tricked.
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