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_16, if x_16 were a police officer, then x_16 is a lawyer. For all x_16, x_16 will read a book or x_16 will sleep. There is at least one x_16 for which x_16 will drink water. For all x_16, x_16 will not read a book. For all x_16, x_16 is a police officer.
For all x_16, x_16 is a lawyer can be inferred via the universal modus ponens rule. For all x_16, x_16 will sleep can be inferred via the universal disjunctive syllogism rule. There is at least one x_16 for which x_16 will drink water and x_16 is a police officer can be inferred via the existential conjunction rule. There is at least one x_16 for which x_16 is a police officer and x_16 will drink water can be inferred via the existential conjunction rule.