An intelligence that we will never find (nor evidence that this intelligence ever did exist) would be, in practice, the same as an intelligence that didn't exist in factI think there's this cat that a lot of people argue over that would fall into your definition.
But I don't think I could ever have a relationship with Schrodinger's Cat. You could never depend on it being there when dinner's ready.
Technically speaking shouldn't that be ".... when dinner's ready, or not ready"?