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 Mary works, then William is not listening to a song. It is cloudy or William is making tea. If it is cloudy, then William is listening to a song. For all x_14, if x_14 makes tea, then x_14 is listening to a song.
If William were an artist, then it is cloudy can be inferred via the rewriting rule.