premise: A rock climber climbs a steep mountain.
hypothesis: the climber fell off the mountain
explanation_1: The climber cannot be climbing a steep mountain and falling off of the mountain simultaneously.
explanation_2: doesn't mean the rock climber fell
explanation_3: The climber cannot climb and fell simultaneously
premise_logic: exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_climb(e1) & n_mountain(x3) & a_steep(s1) & Theme(s1,x3) & n_climber(x1) & of(x1,x2) & n_rock(x2))
hypothesis_logic: exists e1 s1 x1 x2.(n_mountain(x2) & n_climber(x1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fall(e1))