Consider the following premises. For all x_6, x_6 is not an electrician. For all x_6, if x_6 were a carpenter, then x_6 is running. For all x_6, if x_6 goes running, then x_6 is a carpenter. There is at least one x_6 for which x_6 is an electrician if and only if x_6 is a carpenter. Can we infer the following from them? There is at least one x_6 for which x_6 will not go running.
 From the fact that there is at least one x_6 for which x_6 is an electrician if and only if x_6 is a carpenter, and that for all x_6, x_6 is not an electrician we can infer that there is at least one x_6 for which x_6 is not a carpenter. From the fact that for all x_6, if x_6 were a carpenter, then x_6 is running, and that for all x_6, if x_6 goes running, then x_6 is a carpenter we can infer that for all x_6, x_6 is a carpenter if and only if x_6 will go running. Finally, from the fact that for all x_6, x_6 is a carpenter if and only if x_6 will go running, and that there is at least one x_6 for which x_6 is not a carpenter we can infer that there is at least one x_6 for which x_6 will not go running. Therefore, the answer is yes.