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, if x_8 climbs a mountain, then x_8 is running. For all x_8, x_8 is a politician or x_8 will drive a car. For all x_8, if x_8 drives a car, then x_8 is climbing a mountain. For all x_8, if x_8 were a politician, then x_8 is climbing a mountain. For all x_8, x_8 will write a letter.
For all x_8, if x_8 drives a car, then x_8 is running. For all x_8, if x_8 were a politician, then x_8 is running. For all x_8, x_8 will climb a mountain.