What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 were a politician, then x_5 is playing squash. For all x_5, x_5 will not play squash. For all x_5, x_5 is a politician if and only if x_5 is a soldier. There is at least one x_5 for which x_5 is a soldier or x_5 is an office clerk.
For all x_5, x_5 is not a politician. For all x_5, if x_5 were a politician, then x_5 is a soldier. For all x_5, if x_5 were a soldier, then x_5 is a politician.