premise: A little red-haired boy runs down a grassy hill followed behind by two girls.
hypothesis: A little boy about to trip.
explanation_1: Sentence 1 only talks about a boy running down the hill. It does not mention anything about being off balance, or that he is going to trip.
explanation_2: Just because a little red-haired boy runs down a grassy hill followed behind by two girls, doesn't mean he is about to trip.
explanation_3: Running down hill doesn't always result in a trip.
premise_logic: exists e2 e1 s1 s2 s3 s4 x1 x2 x3 x4.(by(e2,x4) & n_girl(x4) & card_eq_2(x4) & a_behind(s4) & Manner(e2,s4) & Actor(e2,x2) & v_follow(e2) & n_hill(x2) & of(x2,x3) & n_grassy(x3) & a_down(s3) & Manner(e1,s3) & Actor(e1,x1) & v_run(e1) & n_boy(x1) & a_red-haired(s2) & Theme(s2,x1) & a_little(s1) & Theme(s1,x1))
hypothesis_logic: exists s1 s2 x1 x2.(a_topic(x1) & about(x1,x2) & n_trip(x2) & a_to(s2) & Theme(s2,x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))