Atheism destroyed with a question

[Alex K]

For someone to claim the Universe is fine tunned he/she has to prove first that every other possiblities of universes would be caotic and lifeless. It's a bit like the intelligent design claim IMO (you have one "sample" and you claim that it's "perfect"...).

I think a rather common attitude also among physicists is to take the free parameters in the Standard Model seriously, i.e. to assume that different numerical choices of the 23 or so parameters are actually possible alternative universes which "could have been". It then follows rather rigorously that for not too different choices of these parameters, there would e.g. be no stars, or no chemistry. This is a fact, so you would have to reject the premise to deny fine tuning, something I find hard to grok.