What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_2, if y_2 were a soldier, then y_2 is a taxi driver. For all y_2, if y_2 were a politician, then y_2 is a soldier. There is at least one y_2 for which y_2 is a politician or y_2 is not a taxi driver. For all y_2, if y_2 were a soldier, then y_2 is a politician.
For all y_2, if y_2 were a politician, then y_2 is a taxi driver. There is at least one y_2 for which if y_2 were a taxi driver, then y_2 is a politician. For all y_2, y_2 is a politician if and only if y_2 is a soldier. For all y_2, y_2 is a soldier if and only if y_2 is a politician.