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 x: P_12(x) <-> T(x). P_12(h).
exists x: P_12(x) can be inferred via the existential generalization rule. forall x: P_12(x) -> T(x) can be inferred via the universal biconditional elimination rule. forall x: T(x) -> P_12(x) can be inferred via the universal biconditional elimination rule.