What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will not climb a mountain. For all x_12, x_12 is fast if and only if x_12 will take a plane. For all x_12, x_12 will climb a mountain if and only if x_12 is fast. There is at least one x_12 for which x_12 will take a plane if and only if x_12 is a server.
For all x_12, if x_12 were fast, then x_12 is taking a plane. For all x_12, if x_12 climbs a mountain, then x_12 is fast. There is at least one x_12 for which if x_12 takes a plane, then x_12 is a server. For all x_12, if x_12 takes a plane, then x_12 is fast. For all x_12, if x_12 were fast, then x_12 is climbing a mountain. There is at least one x_12 for which if x_12 were a server, then x_12 is taking a plane. For all x_12, x_12 is not fast.