What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~t or r_7. r_7 -> R_13(a_13). q_7 -> S_13(a_13). t or q_7. forall x_13: R_13(x_13) -> S_13(x_13).
q_7 or r_7.