If we were to abandon concern for what is true, what is false, and what remains indeterminate, the world would be totally chaotic. Even those who deny the importance of truth, on the one hand, are quick to jump on anyone who is caught lying.
I recently saw the movie about Ray Charles, and there's a scene where he falls down and the mother doesn't help him. She says, I don't want anyone to treat you like a cripple. I've fallen down before, and Molly will say, get up and just go.