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: There is at least one x_8 for which x_8 will not take a plane or x_8 is a scientist. For all x_8, if x_8 were an artist, then x_8 is taking a plane. For all x_8, x_8 will take a plane or x_8 will not work. For all x_8, x_8 will work or x_8 is an artist.
For all x_8, if x_8 works, then x_8 is taking a plane can be inferred via the universal rewriting rule.