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_5, if x_5 sleeps, then x_5 is drinking water. For all x_5, x_5 will sleep or x_5 will work. For all x_5, x_5 will not drink water.
For all x_5, x_5 will not sleep can be inferred via the universal modus tollens rule.