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_11, if x_11 were happy, then x_11 is curious. For all x_11, x_11 will play a game or x_11 is happy. There is at least one x_11 for which x_11 is not a soldier. For all x_11, if x_11 plays a game, then x_11 is curious. For all x_11, x_11 is a soldier or x_11 is excited.
There is at least one x_11 for which x_11 is excited can be inferred via the existential disjunctive syllogism rule. For all x_11, x_11 is curious can be inferred via the universal disjunction elimination rule.