4 Matching Annotations
  1. May 2020
    1. It may be the case that several sufficient conditions, when taken together, constitute a single necessary condition (i.e., individually sufficient and jointly necessary)
    2. 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
    3. in order for human beings to live, it is necessary that they have air