Consider the following premises. It is snowing or Barbara is fast. If it snows, then it is windy. If Barbara were fast, then it is windy. If it is windy, then it is snowing. Can we infer the following from them? If we can, name the inference rule being used: It is windy.
 From the fact that if it is windy, then it is snowing, and that if it snows, then it is windy we can infer that it is windy if and only if it is snowing via biconditional introduction. From the fact that it is windy if and only if it is snowing we can infer that if it snows, then it is windy via biconditional elimination. Finally, from the fact that if it snows, then it is windy, that if Barbara were fast, then it is windy, and that it is snowing or Barbara is fast we can infer that it is windy via disjunction elimination. Therefore, the answer is yes.