Consider the following premises. For all x_2, x_2 is a bartender and x_2 will work. Can we infer the following from them? If we can, name the inference rule being used: Karen is not working.
 From the fact that for all x_2, x_2 is a bartender and x_2 will work we can infer that Karen is a bartender and Karen is working via universal instantiation. Finally, from the fact that Karen is a bartender and Karen is working we can infer that Karen is a bartender via simplification, which contradicts that Karen is not working. Therefore, the answer is no.