Ok why not.
Michaelm wrote:
Easy !
A From the start of the big bang everything is logical.
B So to get to such a point logic should have existed beforehand.
You basically just say A=>B and A is true.
Let me construct a similiar proof:
A From the start of the big bang everything is Gods work.
B So to get to such a point God should have existed beforehand.
(both statements would be wrong if B was wrong btw)
In every experiment we have done we had to make sure to start from a setpoint so we could calculate exactly what would happen.
If anything was off the experiment could fail.
So if logic was off at the big bang all our logic calculations about the big bang would be wrong. But they do add up almost perfectly.
So logic must have existed at the start of the big bang.
Besides we don't know if any calculations about the Big Bang are true and experiments in astrophysics are notorious inaccurate and the conclusions often hasty your argument here is wrong on a logic basis as well:
Be A: There is logic.
Be B: Any prediction we make.
A=>B is always true if "not A".
I will agree that my translation into logic forms is not very accurate but any other form would have similiar flaws.
So to what logic is: First like I said there are different logics, but all have in common to be invented by humans. I'm used to boolean logic which I used above and to some extend to formal logic used in IT which would have been a lot more complicated to apply here. I don't know what kind of logic is used in philosophy and I'm sadly oblivious to theories of modal logic and such so I can't really talk about them but in any case you should skim through Gödels theorems which offer some funky conclusions.
I am by no means an expert but as far as I know our standart boolean logic fails completely in quantum mechanics*, perhaps they defined (or try to) a new logic for this field, I don't know but in either case we must change our logic according to the universe and not the other way around.
I'm sorry, my post was more offending than meant to be.
[EDIT]: *The whole concept that a statement is either true or false seems to be wrong in the real world.