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 windy, then Barbara is drinking water. If Barbara drinks water, then David is a bartender. It is windy or David is not a bartender.
If it is windy, then David is a bartender can be inferred via the transitivity rule. If David were a bartender, then it is windy can be inferred via the rewriting rule.