John considers himself to be a professional gambler and only a part-time truck driver. he has "won big" several times in his life, but his wife remembers the times that she had to rely on from her parents just to feed and clothe their children because of john's "big losses." however, john keeps gambling because he tends to focus on the "wins" and not on the "losses." john is exhibiting which of the cognitive distortions that lead to a gambling addiction?