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