The cases in which B is educated doesn't really matter for the point I'm trying to make. There are two relevant cases: 1. A is a non-impostor, B uneducated ->

The cases in which B is educated doesn't really matter for the point I'm trying to make. There are two relevant cases: 1. A is a non-impostor, B uneducated -> B has to trust A, but A's argument seems flawed because B doesn't know of the non-obvious feature that fixes the apparent obvious flaw in their argument. 2. A is an impostor, B uneducated -> B has to trust A, but A's argument seems flawed because their is an obvious flaw in their argument that even B can spot. From the point of view of B, there is no way to distinguish between these two situations, and so their being uneducated doesn't help them spot the impostor.