Either John is lost or his girlfriend is wrong. John is not lost. Therefore, his girlfriend is wrong.
This argument form is
A) invalid.
B) modus ponens.
C) modus tollens.
D) disjunctive syllogism.

Question

Quizplus · Accepted Answer

This argument is a disjunctive syllogism because it starts with a disjunction (either/or statement), one option is negated, and thus concludes with the affirmation of the other option.

Either John Is Lost or His Girlfriend Is Wrong