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: forall y_1: T(y_1) or S(y_1). forall y_1: ~T(y_1) or Q(y_1). exists y_1: W(y_1) <-> S(y_1). forall y_1: ~W(y_1).
forall y_1: S(y_1) or Q(y_1) can be inferred via the universal resolution rule. exists y_1: W(y_1) -> S(y_1) can be inferred via the existential biconditional elimination rule. exists y_1: S(y_1) -> W(y_1) can be inferred via the existential biconditional elimination rule. exists y_1: ~S(y_1) can be inferred via the existential biconditional elimination rule.