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, if x_9 were an astronaut, then x_9 is sleeping. For all x_9, if x_9 cooks, then x_9 is an astronaut. For all x_9, x_9 will cook or x_9 will climb a mountain. For all x_9, if x_9 were an astronaut, then x_9 is cooking. For all x_9, if x_9 climbs a mountain, then x_9 is an astronaut.
For all x_9, if x_9 cooks, then x_9 is sleeping. For all x_9, if x_9 climbs a mountain, then x_9 is sleeping. For all x_9, if x_9 climbs a mountain, then x_9 is cooking. For all x_9, x_9 is an astronaut. For all x_9, x_9 will cook if and only if x_9 is an astronaut. For all x_9, x_9 is an astronaut if and only if x_9 will cook.