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_13 for which x_13 is a server or x_13 will drink water. For all x_13, x_13 is not a server. For all x_13, if x_13 drinks water, then x_13 is running. For all x_13, if x_13 plays squash, then x_13 is not running.
There is at least one x_13 for which x_13 will drink water.