What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 is fast or x_8 will take a plane. There is at least one x_8 for which x_8 is not fast or x_8 will listen to a song. For all x_8, if x_8 plays a game, then x_8 is climbing a mountain. For all x_8, x_8 will take a plane if and only if x_8 will play a game. For all x_8, x_8 will not climb a mountain.
For all x_8, x_8 will not play a game. There is at least one x_8 for which x_8 will take a plane or x_8 will listen to a song. For all x_8, if x_8 takes a plane, then x_8 is playing a game. For all x_8, if x_8 plays a game, then x_8 is taking a plane.