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 reads a book, then y_2 is drinking water. There is at least one y_2 for which y_2 is a police officer if and only if y_2 will read a book. For all y_2, y_2 is not a taxi driver. For all y_2, y_2 is a taxi driver if and only if y_2 will drink water.
For all y_2, if y_2 were a taxi driver, then y_2 is drinking water. There is at least one y_2 for which if y_2 were a police officer, then y_2 is reading a book. For all y_2, if y_2 drinks water, then y_2 is a taxi driver. There is at least one y_2 for which if y_2 reads a book, then y_2 is a police officer. For all y_2, y_2 will not drink water.