Consider the following premises. For all x_8, x_8 is sad or x_8 will go running. For all x_8, if x_8 were sad, then x_8 is an artist. For all x_8, if x_8 were an artist, then x_8 is taking a plane. There is at least one x_8 for which if x_8 takes a plane, then x_8 is happy. For all x_8, if x_8 goes running, then x_8 is an artist. Can we infer the following from them? For all x_8, x_8 is not happy.
 From the fact that for all x_8, if x_8 were sad, then x_8 is an artist, that for all x_8, if x_8 goes running, then x_8 is an artist, and that for all x_8, x_8 is sad or x_8 will go running we can infer that for all x_8, x_8 is an artist. From the fact that for all x_8, if x_8 were an artist, then x_8 is taking a plane, and that for all x_8, x_8 is an artist we can infer that for all x_8, x_8 will take a plane. Finally, from the fact that there is at least one x_8 for which if x_8 takes a plane, then x_8 is happy, and that for all x_8, x_8 will take a plane we can infer that there is at least one x_8 for which x_8 is happy, which contradicts that For all x_8, x_8 is not happy. Therefore, the answer is no.