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_8, x_8 will go running or x_8 is not a police officer. For all x_8, x_8 will read a book. There is at least one x_8 for which x_8 is a mechanic. For all x_8, if x_8 reads a book, then x_8 is running.
For all x_8, x_8 will go running can be inferred via the universal modus ponens rule. Some mechanics will read a book can be inferred via the existential conjunction rule. There is at least one x_8 for which x_8 will read a book and x_8 is a mechanic can be inferred via the existential conjunction rule. For all x_8, if x_8 were a police officer, then x_8 is running can be inferred via the universal rewriting rule.