What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, y is a police officer or y is a writer. For all y, y is fast or y is excited. For all y, if y were a writer, then y is working. For all y, if y were excited, then y is a janitor. For all y, y will work or y is not a police officer. For all y, y is a janitor or y is not fast.
For all y, if y were a police officer, then y is working. For all y, if y were fast, then y is a janitor.