I saw these two philosophical CAPTCHAs on Twitter and fell in love.
If you don’t understand the jokes, look up “The Ship of Theseus” online. It’s a fascinating thought experiment.
Then look up Rene Magritte’s “Treachery of Images” (for the image of the pipe). You’ll understand it right away.
Best of all, I made one myself, based upon the Schrödinger’s Cat thought experiment from physics.
I’ve very excited about it.