What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_18, x_18 will play a game. For all x_18, if x_18 were a server, then x_18 is a taxi driver. For all x_18, if x_18 were a janitor, then x_18 is poor. For all x_18, x_18 is a taxi driver if and only if x_18 is poor. There is at least one x_18 for which x_18 is a janitor or x_18 is a server.
For all x_18, if x_18 were a taxi driver, then x_18 is poor. For all x_18, if x_18 were poor, then x_18 is a taxi driver.