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_2, if x_2 were curious, then x_2 is not taking a plane. For all x_2, x_2 will take a plane. For all x_2, if x_2 drinks water, then x_2 is curious.
For all x_2, x_2 is not curious can be inferred via the universal modus tollens rule.