My favorite argument as quoted out from "The salmon of doubt", a book from Douglas Adams I am reading.
" A guy said to me, "Yes, but the whole theory of evolution is based on a tautology: That which survives, survives." This is tautological, therefore it doesn't mean anything. I thought about that for a while and it finally occurred to me that a tautology is something that if it means nothing, not only that no information has gone into it, but that no consequence has come out of it. So we may have accidentally stumbled upon the ultimate answer; it's the only thing, the only force, arguably the most powerful of which we are aware, which requires no other input, no other support from any other place, is self-evident, hence tautological, but nevertheless astonishingly powerful in its effects. It's hard to find anything that corresponds to that, and I therefore put it at the beginning of one of my books. I reduced it to what I thought were the bare essentials, which are very similar to the ones you came up with earlier, which were "Anything that happens happens, anything that in happening causes something else to happen causes something else to happen and anything that in happening causes itself to happen again, happens again." In fact you don't even need the second two because they flow from the first one, which is self-evident and there's nothing else you need to say; everything else flows from that. So I think we have in our grasp here a fundamental, ultimate truth, against which there is no gainsaying. It was spotted by the guy who said this is a tautology. Yes, it is, but it's a unique tautology in that it requires no information to go in, but an infinite amount of information comes out of it. "
I havent really understood it well, but makes sense... I think