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_10, if x_10 sleeps, then x_10 is driving a car. There is at least one x_10 for which x_10 will sleep or x_10 is an electrician. For all x_10, x_10 will not drive a car.
For all x_10, x_10 will not sleep can be inferred via the universal modus tollens rule.