Consider the following premises. For all x_10, if x_10 sleeps, then x_10 is fast. If David were fast, then it is snowing. For all x_10, if x_10 were fast, then x_10 is sleeping. Can we infer the following from them? If we can, name the inference rule being used: It is snowing.
We cannot infer that from the premises. Therefore the answer is no.