What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~t_3. q_1. r_1 <-> t_3. r_1 <-> r.
~t_3 and q_1. q_1 and ~t_3. r_1 -> t_3. r_1 -> r. t_3 -> r_1. r -> r_1. ~r_1.