Consider the following premises. For all z_2, z_2 is not an electrician. For all z_2, z_2 is an electrician if and only if z_2 is a scientist. For all z_2, if z_2 drinks water, then z_2 is playing squash. For all z_2, if z_2 plays squash, then z_2 is drinking water. There is at least one z_2 for which z_2 is a scientist if and only if z_2 will drink water. Can we infer the following from them? For all z_2, z_2 will play squash.
 From the fact that for all z_2, z_2 is an electrician if and only if z_2 is a scientist, and that for all z_2, z_2 is not an electrician we can infer that for all z_2, z_2 is not a scientist. From the fact that there is at least one z_2 for which z_2 is a scientist if and only if z_2 will drink water, and that for all z_2, z_2 is not a scientist we can infer that there is at least one z_2 for which z_2 will not drink water. From the fact that for all z_2, if z_2 plays squash, then z_2 is drinking water, and that for all z_2, if z_2 drinks water, then z_2 is playing squash we can infer that for all z_2, z_2 will play squash if and only if z_2 will drink water. Finally, from the fact that for all z_2, z_2 will play squash if and only if z_2 will drink water, and that there is at least one z_2 for which z_2 will not drink water we can infer that there is at least one z_2 for which z_2 will not play squash, which contradicts that For all z_2, z_2 will play squash. Therefore, the answer is no.