Premise: Nathan Donald `` Nate '' Diaz ( born April 16 , 1985 ) is an American professional mixed martial artist currently competing for the Ultimate Fighting Championship ( UFC ) . Nicholas Robert `` Nick '' Diaz ( born August 2 , 1983 ) is an American professional mixed martial artist who is currently signed with the Ultimate Fighting Championship ( UFC ) .
Hypothesis: Nate Diaz refused to ever be a mixed martial artist.
Label: CONTRADICTION