The classic Thatcher illusion[0]. [0] https://en.wikipedia.org/wiki/Thatcher_effect https://en.wikipedia.org/wiki/Thatcher_effect Edited for clarity, started

The classic Thatcher illusion[0]. [0] https://en.wikipedia.org/wiki/Thatcher_effect https://en.wikipedia.org/wiki/Thatcher_effect Edited for clarity, started writing then wiped half and didn't check first half.