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A passage says people who sleep longer earn higher scores, then concludes that sleep causes higher scores. What is the flaw?

デッキ「CSAT (Suneung) essentials: original practice」の単語カード。

解答

It treats correlation as causation. Another factor may drive both.

解説

The report shows only that the two measures move together. Without a controlled comparison, a third factor such as health or study habits could explain both.

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