What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 will not write a letter. For all x_5, x_5 will play tennis or x_5 will sleep. For all x_5, if x_5 plays tennis, then x_5 is writing a letter. For all x_5, if x_5 were an astronaut, then x_5 is not sleeping.
For all x_5, x_5 will not play tennis.