Consider the following premises. For all x_14, if x_14 were rich, then x_14 is a mechanic. It is snowing if and only if Richard is climbing a mountain. For all x_14, if x_14 were a mechanic, then x_14 is a sailor. For all x_14, x_14 will climb a mountain if and only if x_14 is rich. For all x_14, x_14 is not a sailor. Can we infer the following from them? It is not snowing.
 From the fact that for all x_14, if x_14 were a mechanic, then x_14 is a sailor, and that for all x_14, x_14 is not a sailor we can infer that for all x_14, x_14 is not a mechanic. From the fact that for all x_14, if x_14 were rich, then x_14 is a mechanic, and that for all x_14, x_14 is not a mechanic we can infer that for all x_14, x_14 is not rich. From the fact that for all x_14, x_14 will climb a mountain if and only if x_14 is rich, and that for all x_14, x_14 is not rich we can infer that for all x_14, x_14 will not climb a mountain. From the fact that for all x_14, x_14 will not climb a mountain we can infer that Richard is not climbing a mountain. Finally, from the fact that it is snowing if and only if Richard is climbing a mountain, and that Richard is not climbing a mountain we can infer that it is not snowing. Therefore, the answer is yes.