premise: A person is climbing a wooden ladder on a very steep, jagged, rock cliff.
hypothesis: A person is mountain climbing using nothing but his hands and the rocks.
explanation_1: A wooden ladder is not a mountain.
explanation_2: When nothing is used for climbing a mountain, a ladder cannot be used.
explanation_3: a ladder is not nothing
premise_logic: exists e1 s1 s2 s3 x1 x2 x3 x4.(on(e1,x3) & n_cliff(x3) & of(x3,x4) & n_rock(x4) & a_,(s3) & Theme(s3,x3) & a_steep(s2) & Theme(s2,x3) & r_jag(x3) & r_very(x3) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_ladder(x2) & a_wooden(s1) & Theme(s1,x2) & n_person(x1))
hypothesis_logic: exists p1 x1 x5 x7.(n_rock(x5) & n_hand(x7) & of(x7,x5) & n_male(x5) & exists e1 e2 x2 x3 x4.((x1 = x2) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_use(e2) & subset_of(x5,x4) & -exists x6.(subset_of(x6,x4) & but(x6,x7) & n_thing(x6)) & Actor(e1,x3) & v_climb(e1) & (x2 = x3) & n_mountain(x2)) & n_person(x1))