I had an e.mail from Simon Waters pointing out that Flexigesis would be a good target for a Googlewhack. But I'm not sure that it counts if you've made the word up yourself. So in an effort to promote the word for the Oxford English Dictionary here is a definition.
Flexigesis (n) An attempt to explain something that you are unsure of. An explanation of something that changes as you are explaining it. An explanation in which the explanation itself becomes part of the uncertainity.
Uncertainity (n) When things really get out of hand on the explaining front. Makes Heisenberg look like a man with pipe and slippers sitting in an armchair stroking Schroedinger's cat telling his grandchildren what's for supper.