I think there are two jumps in logic I made, one more defensible than the other. The first: > Loads of systems exhibit Turing universality, so a small change i

I think there are two jumps in logic I made, one more defensible than the other. The first: > Loads of systems exhibit Turing universality, so a small change in alpha shouldn't break that property of our universe. (I consider this relatively indefensible, and the weakest part of my argument.) The other is > Turing universality => intelligent life is inevitable, or at least likely. I think that this second piece, although not discussed explicitly in the post, can be defended. It's not a highbrow argument, just that often-made observation that, if a "computer" requires finite size and finite energy to create, then somewhere in the universe, a computer will come into being by random chance.