When you do see me, you'll get the idea from when you see me that it's all off the top of my head. A lot of it is a beginning, middle and the end. But it's different every night. I have a lot of jokes in my back pocket I've said over the years.
The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination. Even when the external and scientific requirements for the birth of an idea have long been there, it generally needs an external stimulus to make it actually happen; man has, so to speak, to stumble right up against the thing before the idea comes.