Obviously everyone has their own favorite optical illusion depending on how convincing it was for themselves. My favorite still is the checkerboard illusion htt

Obviously everyone has their own favorite optical illusion depending on how convincing it was for themselves. My favorite still is the checkerboard illusion https://en.m.wikipedia.org/wiki/Checker_shadow_illusion https://en.m.wikipedia.org/wiki/Checker_shadow_illusion A few times I've shown it to people and the response was "I don't get it. What's the same?" Because they can't believe that their initial reading of the description is correct!