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: Robert is playing a game or William is not an electrician. William is an electrician or Robert is not playing a game.
If William were an electrician, then Robert is playing a game can be inferred via the rewriting rule. If Robert plays a game, then William is an electrician can be inferred via the rewriting rule.