Andrea is the sister of Henry, and Henry is the brother of Bill. Thus, Bill is the brother of Andrea.
A) Deductive, sound.
B) Deductive, valid.
C) Inductive, weak.
D) Deductive, invalid.
E) Inductive, strong.

Question

Quizplus · Accepted Answer

This argument is deductive because it presents a logical relationship between the three individuals. It is also valid because the conclusion logically follows from the premises. If Andrea is the sister of Henry and Henry is the brother of Bill, then it is necessarily true that Bill is the brother of Andrea.

Andrea Is the Sister of Henry, and Henry Is the Brother