Structural insight

Language is the dress of thought — Samuel Johnson , The Life of Cowley , 1779(?). Only a few, out of the hundred, claimed to use mathemat...

"Why is a raven like a writing desk?" ... "No, I give it up," Alice replied. "What's the answer?" "...

What?  You've never heard of it?  A big knock-down, drag-out fight between great minds of its day over, more-or-less, the philosophy o...