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: There is at least one x_3 for which if x_3 were bored, then x_3 is rich. For all x_3, if x_3 were fast, then x_3 is bored. For all x_3, if x_3 were rich, then x_3 is fast.
For all x_3, if x_3 were rich, then x_3 is bored can be inferred via the universal transitivity rule. There is at least one x_3 for which if x_3 were bored, then x_3 is fast can be inferred via the existential transitivity rule. There is at least one x_3 for which if x_3 were fast, then x_3 is rich can be inferred via the existential transitivity rule.