Hi Lucy,
I'm sorry if I've confused you, but from where I sit it looks like you're determined to go off topic. First it was gravity, then it was randomness, then when I mentioned trying to tie randomness into the topic you said, "Sure, Percy, gladly," then proposed a strategy where would you would first establish that there are no non-causal effects of random mutation, which is precisely what was objected to discussing in this thread. Entire threads have been used up with discussions of the nature of randomness, we don't need yet another casualty.
My expressions of concern stem from the greater interest you've shown so far in the digressions as opposed to the topic, but if you think what you've got will address the topic then go for it. On the other hand, if you're just planning to discuss randomness anyway then I really wish you wouldn't.
--Percy