It occurred to me today that we should have a formal proof that shows that everyone is indeed a Sith.
The premises are that 1. All people deal in absolutes and 2. only a Sith deals in absolutes (if x deals in absolutes, then x is a Sith). After that is a little busy work, then the assumption of a person. Given that there is a person, that person must deal in absolutes, and must therefore be a Sith.
Premise 1 isn't exactly elegant, and I'm open to suggestions for better ones.