@dexter, Sorry for the hurriedness, I can fill in more later. Briefly, I'm not just saying you can't be 100.00000000% sure of the regularity of the universe; I'm saying you can't be sure of it at all. You can't even assign it positive probability.
"I see the chance of it being irrational to be vanishingly unlikely and thus not worth planning around."
Right, but what you can't do is give any reason why what "you see" as the chance has any bearing at all on what will actually happen. Your brain was formed in the past by evolution, under conditions of regularity. Sure it was adaptive, as long as that lasted, for you to believe in regularity. The problem is, that has no bearing on whether regularity will actually continue, and neither does any other source of knowledge available to you. So there is no reason whatsoever for you to take that intuition seriously as likely reflecting the actual state of the world.
As for the argument for God: I have no direct-line argument from this to His existence. Rather, I'm inviting you to compare worldviews with me, and suggesting that yours is epistemologically bankrupt, while mine is not. You are claiming knowledge (even probabilistic knowledge) that you couldn't actually have access to on your terms, whiel I am not.
At the least, you are committing just as big a leap of blind faith as the thesit you criticize for just that. But in reality, you're doing much more so, for he can explain his beliefs on their own terms, and you cannot.
@santosh,
"I have a proposition, that things will continue as they are, and physics will more or less hold, with or without your god, in high probability, statistically."
Yes, and you have no evidence for this proposition. I've done this before, but I'll do it again. The evidence you adduce for the proposition is, "Things have been that way so far." OK, so here is your proof:
1) The future has always been like the past, in the past.
2) Therefore, it will continue to be.
2 does NOT follow from 1, without an additional hypothesis:
1') The future will be like the past.
But 1' is what you're trying to prove; therefore you cannot assume it, for none of your beliefs suggests that you can have unsupported knowledge about the future.
"Our outcomes are verifiably true over the time interval since my first response, but here's the thing - Your proposition adds information on top of my proposition, and there is no evidence to support your additional data, and this was my point. "
Yes, as regards the past, we're both right. The point is that you have no reason, in your worldview, to believe that physics will continue to be true for the NEXT hour WITH ANY PROBABILITY AT ALL. Any attempt to do so amounts to a blind acceptance of 1', which you cannot support.