What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is fast. There is at least one x_12 for which x_12 will work and x_12 will climb a mountain. For all x_12, if x_12 were fast, then x_12 is drinking water.
For all x_12, x_12 will drink water. There is at least one x_12 for which x_12 will work. There is at least one x_12 for which x_12 will climb a mountain.