What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 is an office clerk or x_9 will play squash. For all x_9, if x_9 plays squash, then x_9 is cooking. For all x_9, if x_9 sleeps, then x_9 is cooking. For all x_9, if x_9 sleeps, then x_9 is an office clerk. For all x_9, if x_9 were an office clerk, then x_9 is sleeping.
For all x_9, if x_9 were an office clerk, then x_9 is cooking. For all x_9, x_9 will sleep if and only if x_9 is an office clerk. For all x_9, x_9 is an office clerk if and only if x_9 will sleep.