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: If Richard plays squash, then James is playing a game. Elisabeth is not a police officer or it is cold. James is playing a game or it is not cold. Elisabeth is a police officer or Richard is playing squash.
Richard is playing squash or it is cold can be inferred via the resolution rule. If it is cold, then James is playing a game can be inferred via the rewriting rule.