Consider the following premises. For all x_7, x_7 is a nurse and x_7 will work. For all x_7, x_7 will make tea and x_7 will take a plane. Can we infer the following from them? There is at least one x_7 for which either x_7 is a nurse or x_7 will make tea are not true.
 From the fact that for all x_7, x_7 will make tea and x_7 will take a plane we can infer that for all x_7, x_7 will make tea. From the fact that for all x_7, x_7 is a nurse and x_7 will work we can infer that for all x_7, x_7 is a nurse. Finally, from the fact that for all x_7, x_7 is a nurse, and that for all x_7, x_7 will make tea we can infer that for all x_7, x_7 is a nurse and x_7 will make tea, which contradicts that There is at least one x_7 for which either x_7 is a nurse or x_7 will make tea are not true. Therefore, the answer is no.