Consider the following premises. It is windy or Patricia is not a bartender. Patricia is a bartender or it is not windy. It is not windy. Can we infer the following from them? If we can, name the inference rule being used: Patricia is a bartender.
 From the fact that it is windy or Patricia is not a bartender we can infer that if Patricia were a bartender, then it is windy via rewriting. From the fact that Patricia is a bartender or it is not windy we can infer that if it is windy, then Patricia is a bartender via rewriting. From the fact that if Patricia were a bartender, then it is windy, and that if it is windy, then Patricia is a bartender we can infer that Patricia is a bartender if and only if it is windy via biconditional introduction. Finally, from the fact that Patricia is a bartender if and only if it is windy, and that it is not windy we can infer that Patricia is not a bartender via biconditional elimination, which contradicts that Patricia is a bartender. Therefore, the answer is no.