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 drive a car or x_6 is not rich. For all x_6, x_6 is a doctor or x_6 is rich. For all x_6, if x_6 were a doctor, then x_6 is driving a car. For all x_6, if x_6 drives a car, then x_6 is making tea.
For all x_6, if x_6 were a doctor, then x_6 is making tea can be inferred via the universal transitivity rule. For all x_6, if x_6 were rich, then x_6 is driving a car can be inferred via the universal rewriting rule.