Kit, you are a very sharp cat, but you do have one blind spot, as Bill M. once observed about you: You can't tell good evidence from bad, and it really gets you sideways on this topic, I believe. The world is not all 1's and zeros. Some things are closer to 1 and some are closer to zero. A completely binary view of the world allows for no nuance. Try some tertiary for a change. As smart as you might be, you are not smart enough to be certain about this. Besides, certainty is the enemy of curiosity, and curiosity is the cornerstone of knowledge. Get you some brother.