In a universe without inherent meaning, define best, optimal, and true. We all choose paths forward with uncertainty both about what is desirable and about how

In a universe without inherent meaning, define best, optimal, and true. We all choose paths forward with uncertainty both about what is desirable and about how each path might get us there. The perceived trustworthiness of the people pitching each path factors into that decision, precisely because of the uncertainty involved. Calling people "rational" or "irrational" doesn't make sense if there isn't an end goal to measure us against.