I mean we know what we know by who we believe to be honest. Some believe only liars, distrusting the apparition of an honest man. Dependence on self rationalizations is sorting out those we believe in the past within ourselves and bouncing them off of each other in an inner dialog called reason [or imagination], leaving us with an emotional state of “certainty” which we profess to be truth.
Life as a human is interesting. Not that I know any different, but I barely even know this