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_4, x_4 is an artist or x_4 is not an electrician. For all x_4, x_4 is not a soldier or x_4 is curious. For all x_4, x_4 is a soldier or x_4 is an electrician. For all x_4, if x_4 were curious, then x_4 is an artist.
For all x_4, x_4 is an electrician or x_4 is curious can be inferred via the universal resolution rule. For all x_4, if x_4 were an electrician, then x_4 is an artist can be inferred via the universal rewriting rule.