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 William plays a game, then Elisabeth is taking a plane. If Elisabeth takes a plane, then Charles is bored. William is playing a game or Charles is not bored.
If William plays a game, then Charles is bored can be inferred via the transitivity rule. If Charles were bored, then William is playing a game can be inferred via the rewriting rule.