What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~t or p_1. p_1 <-> S_13(a_13). t or R_13(a_13). forall x_13: R_13(x_13) -> S_13(x_13).
R_13(a_13) or p_1. R_1(a_13) -> t. p_1 -> S_13(a_13). S_13(a_13) -> p_1.