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_15: R_15(x_15) -> S_15(x_15). u <-> p_1. ~u. p_1 <-> S_15(h).
u -> p_1 can be inferred via the biconditional elimination rule. p_1 -> S_15(h) can be inferred via the biconditional elimination rule. p_1 -> u can be inferred via the biconditional elimination rule. S_15(h) -> p_1 can be inferred via the biconditional elimination rule. ~p_1 can be inferred via the biconditional elimination rule.