Definition

An exception to a generalisation is applied to cases where the generalisation should apply.

Explanation

This is clearly fallacious since exceptions should be applied with care.

Examples

Because we allow terminally ill patients to use heroin, we should allow everyone to use heroin.

Because you allowed Jill, who was hit by a truck, to hand in her assignment late, you should allow the entire class to hand in their assignments late.

Counter-examples

None.

Advices

Identify the generalisation in question and show how the special case was an exception to the generalisation.