What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Charles were a mechanic, then Linda is a politician. If Michael drives a car, then Charles is a mechanic. For all x_12, x_12 is happy if and only if x_12 is a politician. Linda is not happy.
If Michael drives a car, then Linda is a politician. For all x_12, if x_12 were happy, then x_12 is a politician. For all x_12, if x_12 were a politician, then x_12 is happy.