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: It is windy. If it is windy, then William is drinking water. Richard is excited if and only if William is drinking water.
William is drinking water can be inferred via the modus ponens rule. If Richard were excited, then William is drinking water can be inferred via the biconditional elimination rule. If William drinks water, then Richard is excited can be inferred via the biconditional elimination rule.