The space that we're looking through is nine-dimensional. If you build a mathematical model, the amount of searching that we've done in 50 years is equivalent to scooping one 8-ounce glass out of the Earth's ocean, looking and seeing if you caught a fish. No, no fish in that glass? Well, I don't think you're going to conclude that there are no fish in the ocean. You just haven't searched very well yet. That's where we are.
The minute you or anybody else knows what you are you are not it, you are what you or anybody else knows you are and as everything in living is made up of finding out what you are it is extraordinarily difficult really not to know what you are and yet to be that thing.