What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_21, x_21 will climb a mountain if and only if x_21 is a taxi driver. There is at least one x_21 for which x_21 is curious. For all x_21, if x_21 were curious, then x_21 is a scientist. For all x_21, if x_21 climbs a mountain, then x_21 is poor. For all x_21, if x_21 were a scientist, then x_21 is a taxi driver.
There is at least one x_21 for which x_21 is a scientist. For all x_21, if x_21 were curious, then x_21 is a taxi driver. For all x_21, if x_21 climbs a mountain, then x_21 is a taxi driver. For all x_21, if x_21 were a taxi driver, then x_21 is climbing a mountain.