According to the Christian THEORY (since I don't need to be certain of anything to have a theory, I just need some evidence that agrees with my conclusions) God has interacted with our reality (not meant to be an exhaustive list):

1) The universe had a cause
2) Life exists
3) Complex biological systems exist
4) The ancient Jews interacted with God quite a bit
5) Jesus came, ministered, performed miracles, died, and was resurrected
6) Miracles still happen
7) There is a god-shaped hole in everyone's psychology
8) The "inter-witness of the Holy Spirit" (there, that should get all the WLC fans going)

Of course you will pick apart each one as "you can't prove..." and "baseless assertions". I don't have to prove them, just like evolution, the mountain of evidence I have points to a probabilistic conclusion that the God of Christianity exists. Until I am presented with a theory that answers all of these questions with a different answer, that is what I choose to believe.

Despite the vitriol that is sure to come, this is not an unreasonable THEORY--much like believing in evolutionary theory is not unreasonable.