What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~q_6. p_11 -> q_11. p_6 <-> p_11. q_11 -> p_11. p_6 -> q_6.
~p_6. p_11 <-> q_11. q_11 <-> p_11. p_6 -> p_11. p_11 -> p_6.