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You're wrong about that. He turns the list of scores into a set, then turns it back into a list. Turning it into a set removes the duplicates. Turning the set back into a list doesn't restore the duplicates.
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You're wrong about that. He turns the list of scores into a set, then turns it back into a list. Turning it into a set removes the duplicates. Turning the set back into a list doesn't restore the duplicates.