"If Wendy gets an 'A' in her Anatomy class, then her boyfriend will take her out to celebrate. Her boyfriend takes her out to celebrate. Therefore, it is logical to conclude that Wendy got an 'A' in her Anatomy class." This illustrates a(n) _____.
A) weak inductive argument
B) valid deductive argument
C) strong inductive argument
D) invalid deductive argument

Question

Quizplus · Accepted Answer

This is an example of an invalid deductive argument because it commits the logical fallacy of affirming the consequent. Just because her boyfriend takes her out to celebrate does not necessarily mean the reason was her getting an 'A' in Anatomy; there could be other reasons for the celebration.

"If Wendy Gets an 'A' in Her Anatomy Class, Then