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 x_8 for which x_8 is an astronaut if and only if x_8 is poor. For all x_8, x_8 will play tennis if and only if x_8 is an astronaut.
For all x_8, if x_8 plays tennis, then x_8 is an astronaut. There is at least one x_8 for which if x_8 were an astronaut, then x_8 is poor. For all x_8, if x_8 were an astronaut, then x_8 is playing tennis. There is at least one x_8 for which if x_8 were poor, then x_8 is an astronaut.