If this is the case, why is there even a designation for 'idiot', at least to the extent as Drew has defined it in this thread?
The fact that you're trying to discuss this at some intellectual capacity would seem to, at the very least, imply that you posses some knowledge. Thats not to say you're the most informed person on any given subject, you have already conceded that.
Take into consideration that if you can have such a discussion, and that you're an 'average' person, the term 'idiot' seems to be a stretch. Think about it, if you can do it, logically many others could as well.
So then, what exactly is an 'idiot'?