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, x_3 will not take a plane. There is at least one x_3 for which x_3 is a carpenter if and only if x_3 will go running. For all x_3, if x_3 takes a plane, then x_3 is a carpenter. For all x_3, if x_3 were a carpenter, then x_3 is taking a plane.
For all x_3, x_3 is not a carpenter. For all x_3, x_3 will take a plane if and only if x_3 is a carpenter. For all x_3, x_3 is a carpenter if and only if x_3 will take a plane. There is at least one x_3 for which if x_3 were a carpenter, then x_3 is running. There is at least one x_3 for which if x_3 goes running, then x_3 is a carpenter.