What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 will not work or x_13 is a nurse. There is at least one x_13 for which x_13 will play a game if and only if x_13 will climb a mountain. For all x_13, x_13 is excited if and only if x_13 will climb a mountain. For all x_13, x_13 will work or x_13 will play a game. For all x_13, x_13 is not excited.
For all x_13, x_13 will play a game or x_13 is a nurse. For all x_13, if x_13 were excited, then x_13 is climbing a mountain. There is at least one x_13 for which if x_13 plays a game, then x_13 is climbing a mountain. For all x_13, if x_13 climbs a mountain, then x_13 is excited. There is at least one x_13 for which if x_13 climbs a mountain, then x_13 is playing a game. For all x_13, x_13 will not climb a mountain.