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Suppose for this question that X is necessary but not sufficient for Y. Which of the following is true?
To make it a bit easier, I'll tell you that this question has one and only one correct answer.
Hint. If you're struggling, make it less abstract. Find two concrete features such that the one is necessary but not sufficient for the other. Then replace "X" and "Y" in the
answers with them.
There is at least one thing that is Y without being X
If something is X, then it is Y
All Ys are X
All Xs are Y
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