What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: exists y: W_4(y) -> W(y). forall y: Q(y) -> W(y). forall y: Q(y) or W_4(y). forall y: ~W(y).
Since the premises are contradictory, we can infer anything from them.