Actually, if there isn't, then there won't be any evidence against it, and we will never know.
Heinlein also wrote:
"History does not record anywhere at any time a religion that has any rational basis. Religion is a crutch for people not strong enough to stand up to the unknown without help. But, like dandruff, most people do have a religion and spend time and money on it and seem to derive considerable pleasure from fiddling with it."
And, more apropos to our discussion:
"The truth of a proposition has nothing to do with its credibility. And vice versa."