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: For all x_6, x_6 will not go running. There is at least one x_6 for which if x_6 were poor, then x_6 is running. For all x_6, if x_6 makes tea, then x_6 is poor. For all x_6, if x_6 were a taxi driver, then x_6 is making tea.
There is at least one x_6 for which x_6 is not poor can be inferred via the existential modus tollens rule. For all x_6, if x_6 were a taxi driver, then x_6 is poor can be inferred via the universal transitivity rule. There is at least one x_6 for which if x_6 makes tea, then x_6 is running can be inferred via the existential transitivity rule.