What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x were a writer, then x is playing a game. For all x, x is a writer if and only if x will play a game. For all x, x is a writer if and only if x is a police officer. There is at least one x for which x is not a police officer.
For all x, if x were a writer, then x is playing a game. For all x, if x were a writer, then x is a police officer. For all x, if x plays a game, then x is a writer. For all x, if x were a police officer, then x is a writer. There is at least one x for which x is not a writer.