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_7, if x_7 were a police officer, then x_7 is a cashier. For all x_7, x_7 will make tea. For all x_7, if x_7 sleeps, then x_7 is a cashier. For all x_7, x_7 is not a poet or x_7 is a police officer. For all x_7, x_7 is a poet or x_7 will sleep.
For all x_7, x_7 will sleep or x_7 is a police officer can be inferred via the universal resolution rule.