What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_15, if x_15 sleeps, then x_15 is playing a game. Elisabeth is not climbing a mountain. Jessica is playing tennis if and only if Susan is playing a game. Elisabeth is climbing a mountain if and only if Jessica is playing tennis.
If Jessica plays tennis, then Susan is playing a game. If Elisabeth climbs a mountain, then Jessica is playing tennis. If Susan plays a game, then Jessica is playing tennis. If Jessica plays tennis, then Elisabeth is climbing a mountain. Jessica is not playing tennis.