What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is not sunny. It is sunny if and only if Michael is a lawyer. Michael is a lawyer if and only if it is raining.
If it is sunny, then Michael is a lawyer. If Michael were a lawyer, then it is raining. If Michael were a lawyer, then it is sunny. If it rains, then Michael is a lawyer. Michael is not a lawyer.