What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, y is a soldier if and only if y is a writer. For all y, y will drink water or y is not a writer.
For all y, if y were a writer, then y is drinking water. For all y, if y were a soldier, then y is a writer. For all y, if y were a writer, then y is a soldier.