What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: p_6 -> q_1. t <-> p. q_1 -> t.
p_6 -> t can be inferred via the transitivity rule. t -> p can be inferred via the biconditional elimination rule. p -> t can be inferred via the biconditional elimination rule.