What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_2, if y_2 were a server, then y_2 is a writer. For all y_2, if y_2 were a lawyer, then y_2 is a server. There is at least one y_2 for which if y_2 were a server, then y_2 is a lawyer. For all y_2, if y_2 were a writer, then y_2 is a server.
For all y_2, if y_2 were a lawyer, then y_2 is a writer. There is at least one y_2 for which if y_2 were a writer, then y_2 is a lawyer. For all y_2, y_2 is a server if and only if y_2 is a writer. For all y_2, y_2 is a writer if and only if y_2 is a server. There is at least one y_2 for which y_2 is a server if and only if y_2 is a lawyer. There is at least one y_2 for which y_2 is a lawyer if and only if y_2 is a server.