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Dilbert opens his door and the garbage man stands on the doorstep. The garbage man holds up a crumpled piece of paper and says, "Pardon me, sir, but I couldn't help noticing these equations in your garbage." The garbage man continues, "I took the liberty of correcting a few quantum calculations." Dilbert asks, "Gosh, why are you a garbage man?" The garbage man replies, "I think the question is 'why are YOU an engineer?'"