I assume you mean that the conclusion of a deductively valid argument can only be false if some non-zero subset of the premises are false.

I agree.

But that doesn't mean the conclusion can't be true if some of the premises are false.

For example:

Evan is a person.

2+2=4

Green is not a color.

Therefore

Evan is a person.

Just because a premise is false doesn't mean the conclusion is false.

The premises of any deductive argument always entail a set of propositions.

The conclusion of any deductive argument always entails some subset (possibly including the whole set) of those propositions.

If a premise is false, it means some of the entailed propositions are false. If you just avoid those and pick out others that are true as your conclusion, you have an argument where some premise is false and the conclusion is true.

So, is provoker a hamster? No.

Are all hamsters members of typeC? No.

Is every single entailment of those two premises false? Not necessarily. There are plenty of true ones. Like provoker being a member of typeC.