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 y_3, y_3 will not make tea. For all y_3, if y_3 makes tea, then y_3 is a lawyer. For all y_3, if y_3 were a lawyer, then y_3 is sleeping. For all y_3, if y_3 sleeps, then y_3 is making tea.
For all y_3, y_3 will not sleep can be inferred via the universal modus tollens rule. For all y_3, if y_3 makes tea, then y_3 is sleeping can be inferred via the universal transitivity rule. For all y_3, if y_3 were a lawyer, then y_3 is making tea can be inferred via the universal transitivity rule. For all y_3, if y_3 sleeps, then y_3 is a lawyer can be inferred via the universal transitivity rule.