Queried by the prosecutor, he explains it wasn't unfair because "he was doing the same to everyone else."[21][22][23] Morgenbesser described Gentile ethics as entailing "ought implies can" while in Jewish ethics "can implies don't."[3] When asked his opinion of pragmatism, Morgenbesser replied "It's all very well in theory but it doesn't work in practice."[3] According to Columbia colleague David Albert, Morgenbesser joked, "What is it that you maximize in Jewish decision theory? Regret."[24] Asked to prove a questioner's existence, Morgenbesser shot back, "Who's asking?"[25] A student once interrupted him and said, "I just don't understand."