premise: The 1982 Bavarian Tennis Championships was a men's Grand Prix tennis circuit tournament held in Munich, West Germany which was played on outdoor clay courts. It was the 66th edition of the tournament and was held form 17 May through 23 May 1982. Gene Mayer won the singles title.
hypothesis: Gene Mayer doesn't compete in doubles tennis.
reason: I suggested Mayer does not compete in doubles tennis.  Again, I think the AI has trouble proving a negative.  Based on my earlier attempt, I think it has an easier time with suggestions of exclusivity, but this time I used the negative "doesn't."