What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one z_1 for which z_1 will drive a car if and only if z_1 will drink water. For all z_1, if z_1 were bored, then z_1 is drinking water. For all z_1, if z_1 drinks water, then z_1 is bored.
For all z_1, z_1 is bored if and only if z_1 will drink water. For all z_1, z_1 will drink water if and only if z_1 is bored. There is at least one z_1 for which if z_1 drives a car, then z_1 is drinking water. There is at least one z_1 for which if z_1 drinks water, then z_1 is driving a car.