Identify the following as valid, invalid, strong, or weak: "If Pete passes the class, then so will Sharon. But, Pete didn't pass the class. ∴ Sharon did not pass the class."
A) valid
B) invalid
C) strong
D) weak

Question

Quizplus · Accepted Answer

The argument is invalid because it commits the fallacy of denying the antecedent. Just because Pete didn't pass the class doesn't necessarily mean Sharon didn't pass.

Identify the Following as Valid, Invalid, Strong, or Weak: "If