What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, if x_11 plays tennis, then x_11 is climbing a mountain. For all x_11, if x_11 sleeps, then x_11 is climbing a mountain. For all x_11, x_11 will play tennis. For all x_11, if x_11 climbs a mountain, then x_11 is sleeping. There is at least one x_11 for which if x_11 takes a plane, then x_11 is sleeping.
For all x_11, x_11 will climb a mountain. For all x_11, if x_11 plays tennis, then x_11 is sleeping. There is at least one x_11 for which if x_11 takes a plane, then x_11 is climbing a mountain. For all x_11, x_11 will sleep if and only if x_11 will climb a mountain. For all x_11, x_11 will climb a mountain if and only if x_11 will sleep.