fundamental level and say you know the reason this doesn't work is that god just didn't create us to do thal. now how do you want to deal with that. that's a lot tougher. doesn't mean you-- because of these interesting things that people are doling with genomics and hybrids, that you may not be able to fundamentally alter that. but how you-- the pathway by which you get there is not as certain. and so it means it's probably further out there. >> it's hard to bet against science though. and. >> never bet against science, never. >> because you've scene in the lifetime it's extraordinary what we've seen. >> it just n our lifetime, you know. >> the brain. >> the way we work today, i would never have dreamed in my company that we would be doing the things we're doing. i am-- i stand in awe of my engineers and scientists and what they do today that i never would have dreamed possible when i was a young engineer working. >> imagine this for a moment. president of the united states calls you and he says, rex, i would like you to come down to the white house and let's have a conversation. these are t