A professor knows that if it is raining outside, the window of her office will be wet. She looks at her window and notices that it is wet. She, therefore, concludes that it must be raining outside. Which kind of reasoning is she using?

Question

Quizplus · Accepted Answer

The professor is using "affirming the consequent" reasoning, which is a logical fallacy. She observes the consequence (wet window) and concludes the antecedent (it is raining) without considering other reasons the window could be wet.

A Professor Knows That If It Is Raining Outside, the Window