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: Richard is a soldier and it is raining. Michael is not making tea. If Sarah were a bartender, then Michael is making tea.
Sarah is not a bartender can be inferred via the modus tollens rule. Richard is a soldier can be inferred via the simplification rule. It is raining can be inferred via the simplification rule.