As Neils Bohrs "implys", even the reciprocal of a truth is a truth.. Its possible that the whole unvarnished truth of any matter is too much for one man to contain.. meaning we need each other to even approach understanding a portion of the truth, any truth.. So very true, hosepipe. Yet still people will act as if they had a monopoly on truth....
No one can possibly know absolutely everything that is relevant to even a single simple problem. So we can just forget about having "certainty" in this world....