What is the relationship between "Some crustaceans are not lobsters" and "Some nonlobsters are not noncrustaceans"?

Question

Quizplus · Accepted Answer

The two statements are contrapositives of each other. The contrapositive of "Some crustaceans are not lobsters" is "Some nonlobsters are not noncrustaceans." This means that if the first statement is true, then the second statement must also be true. Therefore, the relationship between them is that they are logically equivalent.

What Is the Relationship Between "Some Crustaceans Are Not Lobsters