 The general thought behind rationality-focused level-bridging principles is that your beliefs about the world should line up with your beliefs about what’s rational for you to believe. If you think it’s rational to believe P (or, if it’s rational for you to think that’s rational…) you should believe P. If you think it’s rational to believe ~P, you should believe ~P. This line of thought involves deferring to rationality as you would defer to an expert.