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_16, x_16 will drink water. For all x_16, x_16 will take a plane. William is a doctor.
There is at least one x for which x is a doctor can be inferred via the existential generalization rule. For all x_16, x_16 will drink water and x_16 will take a plane can be inferred via the universal conjunction rule. For all x_16, x_16 will take a plane and x_16 will drink water can be inferred via the universal conjunction rule.