What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, if x_10 writes a letter, then x_10 is running. For all x_10, x_10 will listen to a song or x_10 will write a letter. For all x_10, x_10 will climb a mountain or x_10 will not listen to a song. For all x_10, if x_10 goes running, then x_10 is climbing a mountain.
For all x_10, if x_10 writes a letter, then x_10 is climbing a mountain. For all x_10, if x_10 listens to a song, then x_10 is climbing a mountain.