premise: A schoolgirl is jumping over a low hurdle.
hypothesis: A girl tripped on herself before she attempt to jump over a hurdle.
explanation_1: A girl who has tripped is not in the process of jumping over a hurdle.
explanation_2: One is in present form, jumping.  The other is in past tense, with the girl having already tripped before she attempts to jump
explanation_3: A girl is not always a schoolgirl.
premise_logic: exists e1 s1 s2 x1 x2.(a_over(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_hurdle(x2) & a_low(s1) & Theme(s1,x2) & n_schoolgirl(x1))
hypothesis_logic: exists e1 p1 x1.(exists e2 p2.(Topic(e2,p2) & Actor(e2,x1) & v_attempt(e2) & exists e3 x2.(over(e3,x2) & n_hurdle(x2) & Actor(e3,x1) & v_jump(e3))) & n_female(x1) & n_female(x1) & before(e1,p1) & on(e1,x1) & Actor(e1,x1) & v_trip(e1) & n_girl(x1))
premise_sim: exists e1 s1 s2 x1 x2.(v_jump(e1) & n_schoolgirl(x1) & n_hurdle(x2) & a_over(s2) & a_low(s1) & Theme(s1,x2) & Theme(e1,x2) & Manner(e1,s2) & Actor(e1,x1))
hypothesis_sim: exists e1 p1 x1.(v_trip(e1) & on(e1,x1) & n_girl(x1) & n_female(x1) & exists e2 p2.(v_attempt(e2) & exists e3 x2.(v_jump(e3) & over(e3,x2) & n_hurdle(x2) & Actor(e3,x1)) & Topic(e2,p2) & Actor(e2,x1)) & before(e1,p1) & Actor(e1,x1))