illusions

I don’t know it when I see one

In Fig. 1, which line is longer? Our eyes will tell us that the first line seems longer than the second, but in fact two...
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today i learned (til)
Mingyuan Zhou

I don’t know it when I see one

In Fig. 1, which line is longer? Our eyes will tell us that the first line seems longer than the second, but in fact two...