It is false that no underdogs are winners. Therefore, it is false that some underdogs are not winners.
A) Valid, no fallacy.
B) Invalid, illicit contraposition.
C) Invalid, illicit subalternation.
D) Invalid, illicit subcontrary.
E) Invalid, illicit conversion.

Question

Quizplus · Accepted Answer

The argument has an illicit subalternation fallacy. The statement "no underdogs are winners" does not necessarily mean that all underdogs are losers. Thus, the statement "some underdogs are not winners" cannot be logically inferred from the first statement. Therefore, the argument is invalid.

It Is False That No Underdogs Are Winners