Individual's Faces list: option to say "not this person"

If I’m looking at an individual’s faces, and I see a face that doesn’t belong to the individual, I currently have the option to re-assign or add a name to that errant face. But I often don’t know who it is, and I’d rather have an additional option: “Remove from Individual” or “Not This Individual” or something that just returns that face to the pool of unassigned faces.