Consider the following premises. If William were happy, then it is not windy. If it snows, then it is cold. It is windy. If Barbara were a sailor, then it is snowing. It is not cold. Can we infer the following from them? William is happy.
 From the fact that if it snows, then it is cold, and that it is not cold we can infer that it is not snowing. From the fact that if Barbara were a sailor, then it is snowing, and that it is not snowing we can infer that Barbara is not a sailor. Finally, from the fact that if William were happy, then it is not windy, and that it is windy we can infer that William is not happy, which contradicts that William is happy. Therefore, the answer is no.