What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~p_7 or t_4. u_3 <-> p_2. p_2 or ~t_4. p_7 or u_3.
u_3 or t_4. t_4 -> p_2. u_3 -> p_2. p_2 -> u_3.