What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z sleeps, then z is rich. For all z, z is an artist or z is a carpenter. For all z, if z were a carpenter, then z is rich. There is at least one z for which z is not an artist or z will sleep.
There is at least one z for which z is a carpenter or z will sleep.