What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 will take a plane if and only if x_8 will climb a mountain. For all x_8, x_8 will take a plane if and only if x_8 will make tea. For all x_8, x_8 will not climb a mountain.
For all x_8, if x_8 takes a plane, then x_8 is climbing a mountain. For all x_8, if x_8 takes a plane, then x_8 is making tea. For all x_8, if x_8 climbs a mountain, then x_8 is taking a plane. For all x_8, if x_8 makes tea, then x_8 is taking a plane. For all x_8, x_8 will not take a plane.