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_8, x_8 will not drink water or x_8 is a scientist. For all x_8, x_8 will take a plane or x_8 is a carpenter. For all x_8, if x_8 were a carpenter, then x_8 is drinking water. For all x_8, x_8 will not take a plane or x_8 is a doctor. For all x_8, if x_8 were a doctor, then x_8 is drinking water.
For all x_8, x_8 is a carpenter or x_8 is a doctor can be inferred via the universal resolution rule.