Socrates On Philosophy and Death

[henryp]

This seems intuitive, but I don't think its true.  Ideas exist in our brains.  If nobody knows the Pythagorean theorem, there is no longer a Pythagorean theorem.

Are you saying that the square of a hypotenuse is NOT equal to the sum of the squares of the other two sides IF no one knows that to be true?

I'm saying the concept of hypotenuse, sums, squares, sides, etc... would no longer exist.