How many tests have you conducted? (not just asking people at U.M. to prove themselves)How varied have these tests been? Nobody has ever proven Dark Matter exists, and yet scientists believe that it's certainly there somewhere.
You claim to be Skeptical but you never even question your self. A true skeptic is always asking questions and would not step into an argument with an absolute, without evidence.
Well kismit, its the fact that no ones been able to prove anything, under any controlled situtations.