All married bachelors are polygamists. Therefore, it is false that some married bachelors are not polygamists.
A) Invalid, existential fallacy.
B) Invalid, illicit subcontrary.
C) Valid, no fallacy.
D) Invalid, illicit subalternation.
E) Invalid, illicit contrary.

Question

Quizplus · Accepted Answer

The argument is valid because it directly follows that if all members of a group (married bachelors) are said to have a certain property (being polygamists), then it cannot be true that some of them do not have that property. The premise logically entails the conclusion, so there is no fallacy.

All Married Bachelors Are Polygamists