On John Wilkins blog, a commenter posted the following quote:
"If falsehood, like truth, had but one face, we would be more on equal terms. For we would consider the contrary of what the liar said to be certain. But the opposite of truth has a hundred thousand faces and an infinite field. --Michel Eyquem de Montaigne"
This is a notion I have seen stated in many different ways. This is what Tolstoy was getting at as well, albeit with a more limited scope, when he uttered his famous opening to Anna Karenina: "All happy families resemble one another, each unhappy family is unhappy in its own way".
I argue that this leads inexorably to the conclusion that faith is poor epistemology. Faith, belief without evidence, amounts to choosing, at random, from all possible beliefs. Yet those beliefs are overwhelmingly false. Some would say the false are infinitely larger than the true, in which case the probability of a faith belief being true approaches zero.
For example, take the true statement "My car is blue". Now randomly substitute all the other grammatically appropriate words that can be put in that sentence. "My car is red", "My car is green", "My cat is blue", "My teacher is blue", etc. The ratio (true statements) / (false statements) is clearly approaching zero. I realize this is not stated in a mathematically rigorous way, but I have no doubt it could be, although I'm ready to give up the whole idea if a mathematician can show me why I should. Likewise, I understand there can be difficulties in the semantics. How wrong is wrong? When exactly does "blue" become "green". However, these difficulties seem biased to my favor, since semantic difficulties erode the confidence in any statement, which is the thrust of my general argument. If I say you shouldn't be so confident because a disease like measles exists, it hardly helps your argument to challenge my definition of disease as being too specific. That's the sort of argument creationist trolls make.
So mathematically, logically, and pragmatically, faith is a loser.