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: ~U_1(y). forall y: W_3(y) -> ~W(y). forall y: T(y) <-> U_1(y). exists y: Q(y) or T(y). forall y: ~Q(y) or W(y).
exists y: T(y) or W(y) can be inferred via the existential resolution rule. forall y: T(y) -> U_1(y) can be inferred via the universal biconditional elimination rule. forall y: U_1(y) -> T(y) can be inferred via the universal biconditional elimination rule. forall y: ~T(y) can be inferred via the universal biconditional elimination rule.