What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_2, if x_2 drinks water, then x_2 is not working. For all x_2, if x_2 drinks water, then x_2 is a mechanic. For all x_2, if x_2 were a mechanic, then x_2 is drinking water. For all x_2, x_2 will work.
For all x_2, x_2 will not drink water. For all x_2, x_2 will drink water if and only if x_2 is a mechanic. For all x_2, x_2 is a mechanic if and only if x_2 will drink water.