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: r or ~q_10. p <-> q_10. ~q_1. q_1 <-> p. r -> q_10.
q_10 -> r can be inferred via the rewriting rule. p -> q_10 can be inferred via the biconditional elimination rule. q_1 -> p can be inferred via the biconditional elimination rule. q_10 -> p can be inferred via the biconditional elimination rule. p -> q_1 can be inferred via the biconditional elimination rule. ~p can be inferred via the biconditional elimination rule.