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 z, z will drive a car. For all z, z will play a game or z is curious. For all z, if z plays a game, then z is fast. There is at least one z for which if z were curious, then z is fast.
There is at least one z for which z is fast can be inferred via the existential disjunction elimination rule.