Consider the following premises. If it is overcast, then Barbara is not an electrician. If Joseph climbs a mountain, then it is overcast. For all x, x is an electrician. Can we infer the following from them? Joseph is climbing a mountain.
 From the fact that for all x, x is an electrician we can infer that Barbara is an electrician. From the fact that if it is overcast, then Barbara is not an electrician, and that Barbara is an electrician we can infer that it is not overcast. Finally, from the fact that if Joseph climbs a mountain, then it is overcast, and that it is not overcast we can infer that Joseph is not climbing a mountain, which contradicts that Joseph is climbing a mountain. Therefore, the answer is no.