Very true; but then if we were all perfect at remembering where we first heard about such-and-such nobody would ever write fiction or music because fundamentally it's all plagiarised to some degree. So I don't think that's necessarily a bad thing.

Yur. 'S your miffic archetypes, innit? It's also one reason why I've never had any inclination to be a writer, because I do feel that one can never write anything truly original without it being incomprehensible.