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: P(y) or ~T_4(y). exists y: P(y) <-> W(y).
forall y: T_4(y) -> P(y) can be inferred via the universal rewriting rule. exists y: P(y) -> W(y) can be inferred via the existential biconditional elimination rule. exists y: W(y) -> P(y) can be inferred via the existential biconditional elimination rule.