What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, if x_13 were sad, then x_13 is poor. For all x_13, if x_13 were poor, then x_13 is climbing a mountain. For all x_13, if x_13 climbs a mountain, then x_13 is not bored. There is at least one x_13 for which x_13 is bored. For all x_13, if x_13 takes a plane, then x_13 is sad.
There is at least one x_13 for which x_13 will not climb a mountain. For all x_13, if x_13 were sad, then x_13 is climbing a mountain. For all x_13, if x_13 takes a plane, then x_13 is poor.