4 Matching Annotations
- May 2020
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en.wikipedia.org en.wikipedia.org
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It may be the case that several sufficient conditions, when taken together, constitute a single necessary condition (i.e., individually sufficient and jointly necessary)
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being a male is a necessary condition for being a brother, but it is not sufficient—while being a male sibling is a necessary and sufficient condition for being a brother
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in order for human beings to live, it is necessary that they have air
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