What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_4, if x_4 were an electrician, then x_4 is an astronaut. For all x_4, if x_4 were an astronaut, then x_4 is not a lawyer. There is at least one x_4 for which x_4 is a lawyer.
There is at least one x_4 for which x_4 is not an astronaut.