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A Personal Value Quotient, or P.V.Q., is a system made by Professor Frink to measure your worthiness as a human being.

When Mr. Burns was building a doomsday ark, he wanted to fill it with the most valuable people in Springfield. He invited Mensa to figure out who to put on the ark. Professor Frink told Burns and Mensa about his system of the Personal Value Quotient, which doesn't just measure how intelligent you are but also measures your worthiness as a human being. Frink then sold this idea to Burns and Mensa via a song.

The next day, everyone in Springfield is forced into taking the mandatory test. In the test, Jimbo copied off of Groundskeeper Willie. Later on Channel 6 News, Kent Brockman announced all the scores, stating that they were on a scale of 1 to 500. Lisa was happy to find she got a score of 475, until she found out that Ralph had gotten a score of 476. Lisa then obsessed with finding out why Ralph was more worthy as a human being that she was, following him around...