Consider the following premises. For all z, z will not go running. Jennifer is running if and only if it is raining. If Patricia were an electrician, then it is raining. Can we infer the following from them? If we can, name the inference rule being used: Patricia is an electrician.
 From the fact that for all z, z will not go running we can infer that Jennifer is not running via universal instantiation. From the fact that Jennifer is running if and only if it is raining, and that Jennifer is not running we can infer that it is not raining via biconditional elimination. Finally, from the fact that if Patricia were an electrician, then it is raining, and that it is not raining we can infer that Patricia is not an electrician via modus tollens, which contradicts that Patricia is an electrician. Therefore, the answer is no.