>They're not saying never create subclasses, so much as never start with a base class and then create subclasses from it. Well, whatever they said, they starte

>They're not saying never create subclasses, so much as never start with a base class and then create subclasses from it. Well, whatever they said, they started off with "OOP theory essentially says that..." So, if it's OO theory, I'd appreciate if someone could provide me a reference that shows that it's OO theory, and not just someone's personal opinion.