I already 'qualified' he is a non-sports knower

My roommates and I were discussing an upcoming sports game in a text thread. I stated "I asked my coworker, who doesn't follow sports, which team he liked better: X or Y. He chose team Y." My roommate then responded that he was an idiot. I responded by stating verbatim "I already qualified he is a non-sports knower." My other roommate tried to correct me and state that I should have use…