premise: a man walks on the icy sidewalk.
hypothesis: The man is sitting down.
explanation_1: The man is either sitting or walking, but not both.
explanation_2: A man cannot walk while sitting down
explanation_3: A man  who walks can't be sitting at the same time.
premise_logic: exists e1 x1 x2 x3.(n_sidewalk(x2) & of(x2,x3) & n_icy(x3) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
hypothesis_logic: exists e1 s1 x1.(n_man(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))
premise_sim: exists e1 x1 x2 x3.(v_walk(e1) & on(e1,x2) & of(x2,x3) & n_sidewalk(x2) & n_man(x1) & n_icy(x3) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 x1.(v_sit(e1) & n_man(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1))