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 is a lawyer if and only if z will make tea. There is at least one z for which z will make tea or z is not a lawyer.
There is at least one z for which if z were a lawyer, then z is making tea. For all z, if z were a lawyer, then z is making tea. For all z, if z makes tea, then z is a lawyer.