What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 were a janitor, then x_7 is a scientist. For all x_7, x_7 will not listen to a song or x_7 is a server. For all x_7, if x_7 were a server, then x_7 is a janitor. For all x_7, x_7 will listen to a song. For all x_7, if x_7 plays squash, then x_7 is a scientist.
For all x_7, if x_7 were a server, then x_7 is a scientist.