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 it is overcast, then it is cloudy. Elisabeth is working or it is not cloudy. If Elisabeth works, then it is overcast.
If Elisabeth works, then it is cloudy can be inferred via the transitivity rule. If it is cloudy, then Elisabeth is working can be inferred via the rewriting rule.