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_6, x_6 is not an artist or x_6 is a lawyer. For all x_6, if x_6 drives a car, then x_6 is an artist. There is at least one x_6 for which x_6 will drive a car.
There is at least one x_6 for which x_6 is an artist can be inferred via the existential modus ponens rule.