Of course, your measure of the intelligence of the members is biased towards people who say things that you agree with.
This isn’t actually necessary for the trilemma. Suppose a lot of people hold belief X for irrational reasons, whereas initially rationalists are split between X and ~X. Then holding belief ~X is evidence that you are above average rationality, note that this is true even for rational observers who believe X.
This isn’t actually necessary for the trilemma. Suppose a lot of people hold belief X for irrational reasons, whereas initially rationalists are split between X and ~X. Then holding belief ~X is evidence that you are above average rationality, note that this is true even for rational observers who believe X.