What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Michael were happy, then Mary is drinking water. For all x_12, x_12 is happy or x_12 will go running. If Mary drinks water, then Susan is a cashier. If Michael goes running, then Mary is drinking water.
If Michael were happy, then Susan is a cashier. If Michael goes running, then Susan is a cashier.