What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one y_1 for which if y_1 were rich, then y_1 is a janitor. For all y_1, if y_1 were a janitor, then y_1 is a lawyer. For all y_1, if y_1 were a lawyer, then y_1 is rich. For all y_1, y_1 is not rich.
For all y_1, y_1 is not a lawyer. For all y_1, if y_1 were a janitor, then y_1 is rich. There is at least one y_1 for which if y_1 were rich, then y_1 is a lawyer. There is at least one y_1 for which if y_1 were a lawyer, then y_1 is a janitor.