What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_6 for which x_6 is a soldier. For all x_6, if x_6 writes a letter, then x_6 is playing tennis. For all x_6, x_6 will play a game or x_6 will write a letter. For all x_6, if x_6 sleeps, then x_6 is playing tennis. For all x_6, x_6 will not play a game or x_6 will sleep.
For all x_6, x_6 will write a letter or x_6 will sleep.