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: Richard is excited or James is a police officer. For all x_6, if x_6 works, then x_6 is a writer. If Richard were excited, then James is a writer. For all x_6, if x_6 were a police officer, then x_6 is working.
If James were a sailor, then Richard is excited can be inferred via the rewriting rule. For all x_6, if x_6 were a police officer, then x_6 is a writer can be inferred via the universal transitivity rule.