What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were poor, then x_6 is an astronaut. For all x_6, if x_6 were excited, then x_6 is poor. For all x_6, x_6 is a nurse or x_6 is not an astronaut.
For all x_6, if x_6 were excited, then x_6 is an astronaut. For all x_6, if x_6 were an astronaut, then x_6 is a nurse.