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 Sarah climbs a mountain, then Susan is not taking a plane. If Joseph makes tea, then Susan is taking a plane. Susan is taking a plane or John is not playing a game. John is playing a game or Joseph is making tea.
If John plays a game, then Susan is taking a plane can be inferred via the rewriting rule.