What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 is a mechanic if and only if x_7 will drink water. For all x_7, x_7 is a mechanic.
For all x_7, if x_7 were a mechanic, then x_7 is drinking water. For all x_7, if x_7 drinks water, then x_7 is a mechanic.