The Abbott and Costello routine “Who’s on First?” is one of the greatest comic treasures of our time. Bud Abbott begins listing the improbable names of his team players: Who, What and I Don’t Know (the three basemen), while a befuddled and increasingly frustrated Lou Costello tries to nail down the names in the line-up. In this sketch, “Who’s on first?” is both a question and an answer.Like so many other humorous gems, the hilarity is tempered by the reality from which it springs. We often don’t know who does what.

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