Ashley P.

asked • 10/06/19

Logic/Discrete Mathematics

Suppose one wishes to prove that "if all X are Y, then all Z are W". To do this, it would suffice to show that

  1. All Z are X, and all Y are W.
  2. All X are Z, and all W are Y.
  3. All Y are Z, and all W are X.
  4. All Z are Y, and all X are W.
  5. All Y are X, and all W are Z.
  6. All X are Z, and all Y are W.
  7. All Z are X, and all W are Y.


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