Identify the formal fallacy committed in the following argument. No tragic actors are idiots. Some comedians are not idiots. Therefore, some comedians are not tragic actors.

The fault is two negative premises, the fallacy of exclusive premises.

No tragic actors are idiots is a negative (E) premise.

Some comedians are not idiots is a negative (O) premise.

Both premises being negative, no conclusion follows validly from them.

A syllogism whose premises are both negative commits the exclusive-premises fallacy.