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_1, x_1 is a politician. For all x_1, if x_1 were a politician, then x_1 is working. For all x_1, if x_1 works, then x_1 is driving a car.
For all x_1, x_1 will work can be inferred via the universal modus ponens rule. For all x_1, if x_1 were a politician, then x_1 is driving a car can be inferred via the universal transitivity rule.