What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, if x_3 were a taxi driver, then x_3 is bored. For all x_3, x_3 is not happy. For all x_3, x_3 is bored if and only if x_3 is happy.
For all x_3, if x_3 were bored, then x_3 is happy. For all x_3, if x_3 were happy, then x_3 is bored. For all x_3, x_3 is not bored.