What if were set some problem where we are told to assume that
2+2 = 5
1+1 = 2
1+1+1+1+1 = 5
3rd one looks fine to me. :)
Edit: Whoosh. Yes, that was the sound of this going right over my head.
I'm surprised you don't like the 2nd one :)
The point being one false statement declared as true is enough to render logical derivations unrelliable no matter how many true statements you include with it.
EDIT: I see by the karma bombing we can't even ask. Why even call this part of the site "discussion?"
Some of the classic questions about an omnipotent god include