When we learn that, say, 2+2=4, is that something really true about the universe, or is it something some caveman made up? Does a cube exist as something more than just a figment of our imagination?
When we learn that, say, 2+2=4, is that something really true about the universe, or is it something some caveman made up? Does a cube exist as something more than just a figment of our imagination?