My Webster's dictionary (not the shortened, abridged on-line version) uses "a feebleminded person or mental defective who has a potential age of between 8 and 12 years and is capable of doing routine work under supervision."
We've seen enough posts from Eric to know that he isn't a moron. How can you not see Ray Haddad's use of that "moron" as a vulgarity in the context of our discussions on rec.models.railroad?