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, if x_5 climbs a mountain, then x_5 is drinking water. For all x_5, if x_5 were a janitor, then x_5 is drinking water. For all x_5, x_5 is happy. For all x_5, x_5 will climb a mountain or x_5 is a janitor.
For all x_5, x_5 will drink water.