What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x for which if x sleeps, then x is a server. For all x, if x were a doctor, then x is a server. For all x, x is bored or x is a doctor. For all x, x is not bored or x will sleep. For all x, if x drinks water, then x is a sailor. For all x, x will drink water.
For all x, x is a sailor can be inferred via the universal modus ponens rule. For all x, x is a doctor or x will sleep can be inferred via the universal resolution rule.