premise: Four people wearing backpacks walking in a line along a mountain trail.
hypothesis: No one is on the mountain trail
explanation_1: There are either four people walking on the trail or there is no one on the trail.
explanation_2: If there  is no one on the mountain trail then there cannot be four people on the mountain trail.
explanation_3: No one implies that there is not four people
premise_logic: exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & along(e1,x6) & n_trail(x6) & of(x6,x7) & n_mountain(x7) & in(e1,x5) & n_line(x5) & Actor(e1,x4) & v_walk(e1) & (x3 = x4) & n_backpack(x3) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
hypothesis_logic: exists x2 x3.(n_trail(x2) & of(x2,x3) & n_mountain(x3) & -exists p1 x1.(on(x1,x2) & n_one(x1)))
premise_sim: exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(v_wear(e2) & v_walk(e1) & of(x6,x7) & n_trail(x6) & n_people(x1) & n_mountain(x7) & n_line(x5) & n_backpack(x3) & in(e1,x5) & card_eq_4(x1) & along(e1,x6) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & Actor(e1,x4) & (x3 = x4) & (x1 = x2))
hypothesis_sim: exists x2 x3.(of(x2,x3) & n_trail(x2) & n_mountain(x3) & all x1.(-on(x1,x2) | -n_one(x1)))