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: Barbara is not playing a game or it is windy. Barbara is playing a game or Mary is taking a plane. For all z, z will not take a plane.
Mary is taking a plane or it is windy can be inferred via the resolution rule. If Mary plays tennis, then Barbara is playing a game can be inferred via the rewriting rule.