Consider the following premises. For all x_8, if x_8 goes running, then x_8 is an electrician. For all x_8, if x_8 writes a letter, then x_8 is not an electrician. For all x_8, x_8 will go running. There is at least one x_8 for which x_8 will write a letter. Can we infer the following from them? There is at least one x_8 for which x_8 is an office clerk.
 From the fact that for all x_8, if x_8 goes running, then x_8 is an electrician, and that for all x_8, x_8 will go running we can infer that for all x_8, x_8 is an electrician. From the fact that for all x_8, if x_8 writes a letter, then x_8 is not an electrician, and that for all x_8, x_8 is an electrician we can infer that for all x_8, x_8 will not write a letter. From the fact that there is at least one x_8 for which x_8 will write a letter we can infer that there is at least one x_8 for which x_8 will write a letter or x_8 is an office clerk. Finally, from the fact that there is at least one x_8 for which x_8 will write a letter or x_8 is an office clerk, and that for all x_8, x_8 will not write a letter we can infer that there is at least one x_8 for which x_8 is an office clerk. Therefore, the answer is yes. Notice, however, that the premises were contradictory, so we can infer anything from them.