What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 is a mechanic or x_5 is not a scientist. There is at least one x_5 for which x_5 is sad or x_5 is a scientist. For all x_5, x_5 is not sad or x_5 will drink water. For all x_5, if x_5 drinks water, then x_5 is a mechanic.
There is at least one x_5 for which x_5 is a scientist or x_5 will drink water. For all x_5, if x_5 were a scientist, then x_5 is a mechanic.