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: ~p. forall y: R_4(y) -> P(y). p <-> P(d_4).
p -> P(d_4) can be inferred via the biconditional elimination rule. P(d_4) -> p can be inferred via the biconditional elimination rule. ~P(d_4) can be inferred via the biconditional elimination rule.