A teacher told the class of pottery students that half of them would be graded on the number of pots they produced, and the other half on the quality. In the "quantity" group, it didn't matter how good or bad their results, only the total amount of pots they created would count. For the "quality" group, all they had to have at the end of the semester was just one perfect pot to get that "A" in the course.
Quality vs. Quantity
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