premise: Skier takes a steep path down the mountain.
hypothesis: There is snow on the ground.
explanation_1: While the skier is taking a steep path, there is nothing to imply that snow is on the ground.  The skier could easily be in a spot with no snow..
premise_logic: exists e1 s1 x1 x2 x3.(n_mountain(x3) & ne_nam_skier(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & down(x2,x3) & n_path(x2) & a_steep(s1) & Theme(s1,x2))
hypothesis_logic: exists p1 x1 x3.(n_ground(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_snow(x2)))
premise_sim: exists e1 s1 x1 x2 x3.(v_take(e1) & ne_nam_skier(x1) & n_path(x2) & n_mountain(x3) & down(x2,x3) & a_steep(s1) & Theme(s1,x2) & Theme(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1 x3.(n_ground(x3) & exists x2.(on(x2,x3) & n_snow(x2) & (x1 = x2)))