What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 is a mechanic or x_13 will drink water. For all x_13, if x_13 were a mechanic, then x_13 is excited. For all x_13, x_13 is excited if and only if x_13 will drink water. There is at least one x_13 for which x_13 is a soldier. For all x_13, if x_13 were excited, then x_13 is drinking water.
For all x_13, if x_13 were a mechanic, then x_13 is drinking water. For all x_13, if x_13 were excited, then x_13 is drinking water. For all x_13, if x_13 drinks water, then x_13 is excited.