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 for which y is a lawyer if and only if y is a poet. For all y, y is not a lawyer. For all y, if y were a lawyer, then y is a poet.
There is at least one y for which if y were a lawyer, then y is a poet. There is at least one y for which if y were a poet, then y is a lawyer. There is at least one y for which y is not a poet.