I do think that humans can perceive things incorrectly, but it never eliminates truth, nor does it cause truth to become relative to those interpretations. It doesn't make truth dependent on interpretations.

Slavery is wrong. Is this statement true of false?

Who do you need to convince otherwise and once they are convinced, will they demonstrate it by their actions?

That there are no problems in the world, that nothing is broken, that you don't need to go anywhere or do anything, not even eat food, is a kind of horribly freeing or depressing untruthy truth.

Must the truth bear any relation whatsoever to what is good, and if so, why? Is what is good for you good for me in a poker game?