What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 is a scientist or x_5 will write a letter. For all x_5, x_5 will go running. For all x_5, if x_5 goes running, then x_5 is an electrician. For all x_5, if x_5 were a scientist, then x_5 is not an electrician.
For all x_5, x_5 is an electrician.