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 Three engineering students were gathered together...
Three engineering students were gathered together discussing the possible  designers of the human body.  One said, "It was a mechanical engineer. Just look at all the joints."  Another said, "No, it was an electrical engineer. The nervous systems  many thousands of electrical connections." The last said, "Actually it was a civil engineer. Who else would run a  toxic waste pipeline through a recreational area?"
 
  
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