premise: A man in a black and blue jacket and a white helmet skiing down a hill swiftly.
hypothesis: A man goes down the ski hill swiftly because he is an expert.
explanation_1: The man is not necessarily an expert.
explanation_2: It does not need to be an expert to ski down a hill swiftly.
explanation_3: Just because a man is skiing swiftly doesn't mean that he's an expert.
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 p1 s1 x1 x2 x3.(n_male(x2) & n_hill(x2) & of(x2,x3) & n_ski(x3) & exists p2 x4.((x2 = x4) & n_expert(x4)) & because(e1,p1) & a_swiftly(s1) & Manner(e1,s1) & down(e1,x2) & Actor(e1,x1) & v_go(e1) & n_man(x1))