Consider the following premises. For all x_11, x_11 will not play tennis. For all x_11, x_11 will play tennis or x_11 is a poet. There is at least one x_11 for which if x_11 plays squash, then x_11 is a sailor. For all x_11, if x_11 were poor, then x_11 is a sailor. For all x_11, x_11 will play squash or x_11 is poor. Can we infer the following from them? For all x_11, either x_11 is a sailor or x_11 is a poet are not true.
 From the fact that there is at least one x_11 for which if x_11 plays squash, then x_11 is a sailor, that for all x_11, if x_11 were poor, then x_11 is a sailor, and that for all x_11, x_11 will play squash or x_11 is poor we can infer that there is at least one x_11 for which x_11 is a sailor. From the fact that for all x_11, x_11 will play tennis or x_11 is a poet, and that for all x_11, x_11 will not play tennis we can infer that for all x_11, x_11 is a poet. Finally, from the fact that there is at least one x_11 for which x_11 is a sailor, and that for all x_11, x_11 is a poet we can infer that some sailors are poets, which contradicts that For all x_11, either x_11 is a sailor or x_11 is a poet are not true. Therefore, the answer is no.