Consider the following premises. It is not cloudy. If Robert were fast, then it is cloudy. Robert is fast or it is not snowing. Can we infer the following from them? It is snowing.
 From the fact that if Robert were fast, then it is cloudy, and that it is not cloudy we can infer that Robert is not fast. From the fact that Robert is fast or it is not snowing we can infer that if it snows, then Robert is fast. Finally, from the fact that if it snows, then Robert is fast, and that Robert is not fast we can infer that it is not snowing, which contradicts that It is snowing. Therefore, the answer is no.