Some heart attacks are not fatal occurrences, and no strokes are heart attacks. Thus, some strokes are not fatal occurrences.
A) Deductive, sound.
B) Inductive, strong.
C) Deductive, invalid.
D) Inductive, weak.
E) Deductive, valid.

Question

Quizplus · Accepted Answer

The argument is deductive but invalid. Just because some heart attacks are not fatal occurrences and no strokes are heart attacks does not necessarily mean that some strokes are not fatal occurrences. There may be other factors that determine the fatality of a stroke. Therefore, the conclusion does not logically follow from the premises.

Some Heart Attacks Are Not Fatal Occurrences, and No Strokes