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 Charles makes tea, then Elisabeth is reading a book. If Elisabeth reads a book, then it is cloudy. Charles is making tea or it is not cloudy.
If Charles makes tea, then it is cloudy can be inferred via the transitivity rule. If it is cloudy, then Charles is making tea can be inferred via the rewriting rule.