What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_2, if z_2 were curious, then z_2 is playing squash. There is at least one z_2 for which if z_2 plays squash, then z_2 is curious. For all z_2, z_2 will play squash and z_2 will cook.
For all z_2, z_2 will play squash. For all z_2, z_2 will cook. There is at least one z_2 for which z_2 will play squash if and only if z_2 is curious. There is at least one z_2 for which z_2 is curious if and only if z_2 will play squash.