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 it is snowing. If it is late, then it is snowing. It is not windy.
If it is windy, then it is snowing can be inferred via the biconditional elimination rule. If it snows, then it is windy can be inferred via the biconditional elimination rule. It is not snowing can be inferred via the biconditional elimination rule.