The general theme of this talk is creativity – how you do something you’ve never done exactly that way before, yet get it right the first time.  One of the aspects of natural selection that played a role in evolving Homo sapiens was accurate throwing for hunting, often to a target that was not at one of your set-piece practiced distances – and if you got it a little wrong, dinner ran away before you could try again, a real premium on guessing exactly right the first time.  Finding a group of words that all hang together reasonably, when you want to speak a sentence you’ve never spoken before, is exactly the same kind of problem.  The same in logic, and in solving a crossword puzzle.