What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, z will go running. There is at least one z for which z is a writer or z will not go running. For all z, z will work.
For all z, z will go running and z will work. For all z, z will work and z will go running. There is at least one z for which if z goes running, then z is a writer.