Where did the universe come from? Atheistic origin science has no answer.

[Angrboda]

The fine-tuning argument, to me, implies that there is no other set of values that could have led to life in the universe. Otherwise it's not much of an argument, as rasetsu pointed out. So the question is, do we know for certain which knobs on the universe's Options and Settings Menu have to be set to precise values, and how far off would those values need to be to render the whole universe into a solid lump of nothing?

Water will only boil at 212 degrees Farenheit, but I can cook up a half-decent hot dog with only 200. Checkmate, theists!

Recently deceased Victor Stenger did simulations in which you vary more than one parameter at a time (fine tuning advocates typically only look at what would happen if you vary only one parameter in isolation). He found that in something like half the cases one could yield a universe sufficiently stable to serve as a crucible for some form of life.