What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? t -> t_1. p -> s_3. ~t_1. ~s_3. s_3 -> p.
~t. ~p. ~t_1 and ~s_3. ~s_3 and ~t_1. p <-> s_3. s_3 <-> p.