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, y_2 will drink water if and only if y_2 is a sailor. For all y_2, y_2 is a sailor or y_2 will not drink water.
For all y_2, if y_2 drinks water, then y_2 is a sailor. For all y_2, if y_2 drinks water, then y_2 is a sailor. For all y_2, if y_2 were a sailor, then y_2 is drinking water.