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: For all x_10, x_10 is a server or x_10 is a doctor. For all x_10, x_10 is not a bartender. For all x_10, if x_10 were a server, then x_10 is not curious. For all x_10, x_10 is a bartender or x_10 is curious.
For all x_10, x_10 is curious can be inferred via the universal disjunctive syllogism rule.