premise: A man in a black and blue jacket and a white helmet skiing down a hill swiftly.
hypothesis: A man walks down a snowy hill.
explanation_1: the man cannot be skiing and walking (walks) a the same time
explanation_2: Skiing and walking are different activities.
explanation_3: The man is either skiing or he walks down the hill.
premise_logic: exists s1 s2 s3 x1 x2 x3 x4 x5 x6.(a_topic(x3) & swiftly(x3,x4) & down(x4,x6) & n_hill(x6) & n_skiing(x4) & of(x4,x5) & n_helmet(x5) & a_white(s3) & Theme(s3,x4) & n_man(x3) & a_topic(x1) & in(x1,x2) & n_jacket(x2) & a_blue(s2) & Theme(s2,x2) & a_black(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists e1 s1 s2 x1 x2.(a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_hill(x2) & a_snowy(s1) & Theme(s1,x2) & n_man(x1))