By the way, "the world is probabilistic" is one of the key lessons of the rationality community. (Infinite certainty would require infinite amount of evidence,

By the way, "the world is probabilistic" is one of the key lessons of the rationality community. (Infinite certainty would require infinite amount of evidence, according to the Bayes' Theorem.) When you find someone on internet trying to assign probabilities to their beliefs, chances are you have met a rationalist.