Socrates (in Meno) helped a slave kid prove to himself that the square root of 2 is irrational, using nothing but a stick and the sand on the ground. I don't t

Socrates (in Meno) helped a slave kid prove to himself that the square root of 2 is irrational, using nothing but a stick and the sand on the ground. I don't think that kid would understand this "simple proof".