What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will sleep if and only if x_12 will play squash. There is at least one x_12 for which x_12 will sleep if and only if x_12 will drink water. For all x_12, x_12 will not drink water.
For all x_12, if x_12 sleeps, then x_12 is playing squash. There is at least one x_12 for which if x_12 sleeps, then x_12 is drinking water. For all x_12, if x_12 plays squash, then x_12 is sleeping. There is at least one x_12 for which if x_12 drinks water, then x_12 is sleeping. There is at least one x_12 for which x_12 will not sleep.