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: Michael is climbing a mountain. Sarah is making tea if and only if Sarah is excited. If Michael climbs a mountain, then Sarah is making tea.
Sarah is making tea can be inferred via the modus ponens rule. If Sarah makes tea, then Sarah is excited can be inferred via the biconditional elimination rule. If Sarah were excited, then Sarah is making tea can be inferred via the biconditional elimination rule.