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: If it is cloudy, then it is windy. If it is cloudy, then it is windy. If it is windy, then it is cloudy.
It is cloudy if and only if it is windy can be inferred via the biconditional introduction rule. It is cloudy if and only if it is windy can be inferred via the biconditional introduction rule. It is windy if and only if it is cloudy can be inferred via the biconditional introduction rule. It is windy if and only if it is cloudy can be inferred via the biconditional introduction rule.