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) <-> T(y). P(h_1) <-> q_7. forall y: ~T(y).
P(h_1) -> q_7 can be inferred via the biconditional elimination rule. q_7 -> P(h_1) can be inferred via the biconditional elimination rule. forall y: P(y) -> T(y) can be inferred via the universal biconditional elimination rule. forall y: T(y) -> P(y) can be inferred via the universal biconditional elimination rule. forall y: ~P(y) can be inferred via the universal biconditional elimination rule.