Hi, folks. Perhaps this has been discussed before, but I'm new here and I don't see it in the FAQ.
Has anyone else noticed that we've been given (at least) two reasons for Homer's stupidity? In one episode (sorry -- I'm not the type of fan that knows the episode titles), it was because he had a crayon in his brain; in another, the male Simpson plague is revealed. Alas, two reasons. Which do you think we should consider more canonical? Which came last?