Denial! That whole of "evolution as fact" crowd is one awash in denial. Deny likelihoods, probability. Deny any other explanations. Deny that it is a belief system.
Since you cannot determine likelihoods without knowing all the variables, I believe it is the anti-Es who are deluding themselves that "evolution is impossible." No working biologist or geneticist denies the reality of evolution; the only things in dispute are the mechanisms by which it occurs. But hey, keep deluding yourself that it's all a Satanic conspiracy miraculously kept from the public by the tens of thousands of people who work in the biological sciences.