Consider the following premises. For all x_7, x_7 will listen to a song if and only if x_7 will cook. For all x_7, x_7 is a doctor or x_7 will listen to a song. For all x_7, if x_7 takes a plane, then x_7 is cooking. There is at least one x_7 for which x_7 is not a doctor or x_7 will take a plane. Can we infer the following from them? For all x_7, x_7 will not cook.
 From the fact that for all x_7, x_7 is a doctor or x_7 will listen to a song, and that there is at least one x_7 for which x_7 is not a doctor or x_7 will take a plane we can infer that there is at least one x_7 for which x_7 will listen to a song or x_7 will take a plane. From the fact that for all x_7, x_7 will listen to a song if and only if x_7 will cook we can infer that for all x_7, if x_7 listens to a song, then x_7 is cooking. Finally, from the fact that for all x_7, if x_7 listens to a song, then x_7 is cooking, that for all x_7, if x_7 takes a plane, then x_7 is cooking, and that there is at least one x_7 for which x_7 will listen to a song or x_7 will take a plane we can infer that there is at least one x_7 for which x_7 will cook, which contradicts that For all x_7, x_7 will not cook. Therefore, the answer is no.