That brings back my question - Why is it worth being uncertain just because of 0.1% chance? I'm only 99.9% sure gravity exists yet I'm a firm believer and I claim knowledge on it, possibly a 7 on a Dawkins scale.
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you