When a student believes a test form was easier because their friend completed another form faster, which logical fallacy are they committing?

The situation describes a student drawing a conclusion about the difficulty of a test based on a single observation—specifically, their friend's faster completion of a different test form. This illustrates a classic case of hasty generalization.

In this fallacy, an individual takes a limited sample size—in this case, one friend's performance—and generalizes that to a broader conclusion about the entire population of test forms. The student assumes that because one friend finished a different test form quickly, all forms must be easier. This reasoning is flawed because it does not consider the myriad factors that could influence test completion time, such as the individual abilities of test-takers, the actual content of the forms, or external distractions. Thus, the conclusion drawn by the student lacks sufficient evidence and is based on an inadequate basis of reasoning.