Does that mean you don't think an original thought is possible.

That is something that could be endlessly debated and a very good question! My personal opinion (which is also shaped by other opinions) is that all works and creations you see, hear, or write, are in some way at least partly borrowed, influenced, or inspired by works before it. Basically, almost everything is a re-mix. But, I'm not exactly hard nosed about this...I just think copyright laws are against the public interest, as they serve lawmakers and corporations at the core, a lot more than they protect the author, creator etc.