You: Then how can we tell a true revelation from a false one? Those who imagine divine revelation and those who really have them would seem the same to an outside observer.

Aaron: I agree that you would not be able to tell the difference between a true and a false revelation without having had a true one yourself, and that there is no way for you to judge whether my experience was a true one. What is important here is that, although there may be those who have false revelations, there are also those who have true ones. That is sufficient to prove my point.

You: It would be sufficient if it were true. The problem is that, since I cannot tell the difference between one who has been touched by God and one who is deluded, it is possible that everyone is deluded.