theism as a ground for rationality

The most forst thing that we need to go over for my argument to work is the function of logic and rationality in the world. As I am sure most of you will agree, logic by itself is no guarantee of truth. THe process can lead in several directions depending on the facts one uses-and not only facts explicitly brought up in the argument, either. There's always background knowledge that affects things. For example, suppose a woman prominence in the town invited me into her home for a dinner party. Suppose sometime between now and then, I see an insect exterminator's truck pulling into her driveway. There is aany number of things I could conclude, here's two of them:

Ew, that lady has a bug problem, maybe I dont want to eat there after all.

or
Ah, mrs. so and so is married to the orkin man? this will be fscinating, Ive always wanted to talk with someone in that line of work.

NOw clearly I am not informed to decide between the two. But the interersting thing is, if I believe the second statement above, no new evidence will get me to the first. If you tell me the woman isnt married, I can jsut conclude that she is dating the orkin Man. if you tell me that she is married to someone else, then ill be agahst that she is cheating on her husband with the orkin man, and so on. Add for the sake of argument that the first statement is the truth, and we see a basic problem that skeptics have been blowing around forever.