The corollary to this is that much of the current paradigm of anything even of all of society may be considered completely insane in a short period of time, say 100 or more years. There is no way for humans to know any truth, they simply have appealing rhetoric which according to current norms or methods of inquiry seems reasonable and believable. Many of them don't even currently stand up to scrutiny but that doesn't stop anyone from accepting them at face value.