

Definition:
An exception to a generalization is applied to cases where the generalization should apply.
Examples:
(i) Because we allow terminally ill patients to use heroin, we should allow everyone to use heroin.
(ii) Because you allowed Jill, who was hit by a truck, to hand in her assignment late, you should allow me to hand mine in late too because I was lazy and didn't get it done.
Proof:
Identify the generalization in question and show how the special case was an exception to the generalization. It helps to make the context under which the generalization was validated clear since that's typically where the mistakes are made.
References:
Copi and Cohen: 100

