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_6 for which x_6 will work if and only if x_6 is an astronaut. For all x_6, if x_6 were an astronaut, then x_6 is working.
There is at least one x_6 for which if x_6 works, then x_6 is an astronaut. There is at least one x_6 for which if x_6 were an astronaut, then x_6 is working.