darkliight said:
KFunk, but what if the claim was "you have 70 billion eyelashes"? Most people don't stop at God exists or God does not exist. They're fairly specific.
Sure, if the entity is defined precisely then you might be lucky enough to get the following condition:
If god exists (G) THEN some event X will necessarily occur ............. (G --> X)
but using classical logic we know that,
If X does not occur THEN it is not the case that god exists (~X --> ~G)
and so you could feasibly generate an empirical case against the existence of god. However, some issues emerge. Firstly, the conditional implication (G --> X) has to be an airtight, logical one, such that X will necessarily occur if god exists. Secondly, X has to be such that (a) we can observe it and (b) we are highly unlikely to miss it.
Unfortunately, as I discussed a few pages back, religion has an unfortunate tendency to shield itself from such arguments by positing, say, that god requires faith rather than empirically justified belief, or that god works in mysterious ways and thus we can conclude little about god on the basis of empirical observations. This latter 'mysterious god' claim is something of a cure-all because it suggests that god is so beyond human understanding that we could never adequately determine the truth of a conditional of the form G --> X. Bullshit? Yes, in empircal terms, but that's what we're working with.