Consider the following premises. If Sarah were excited, then Joseph is an electrician. For all z_4, z_4 is not an electrician. William is cooking and it is overcast. Can we infer the following from them? Sarah is excited.
 From the fact that for all z_4, z_4 is not an electrician we can infer that Joseph is not an electrician. Finally, from the fact that if Sarah were excited, then Joseph is an electrician, and that Joseph is not an electrician we can infer that Sarah is not excited, which contradicts that Sarah is excited. Therefore, the answer is no.