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 and only if Michael is taking a plane. It is windy or it is not snowing. Michael is taking a plane or it is snowing.
If it snows, then it is windy can be inferred via the rewriting rule. If it is windy, then Michael is taking a plane can be inferred via the biconditional elimination rule. If Michael takes a plane, then it is windy can be inferred via the biconditional elimination rule.