premise: Two little girls ride an inflatable dinghy down a purple water slide.
hypothesis: Sisters squeal in delight as the go down the slide.
explanation_1: Just because two girls are riding down a slide this doesn't mean they are sisters.
explanation_2: The fact that the sisters are squealing in delight is new information. The first sentence doesn't explain their mood.
explanation_3: Not all girls are sisters.
premise_logic: exists e1 s1 s2 s3 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_slide(x3) & of(x3,x4) & n_water(x4) & a_purple(s3) & Theme(s3,x3) & n_dinghy(x2) & a_inflatable(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(n_slide(x4) & n_go(x3) & in(e1,x2) & as(x2,x3) & down(x3,x4) & n_delight(x2) & Actor(e1,x1) & v_squeal(e1) & n_sister(x1))
premise_sim: exists e1 s1 s2 s3 x1 x2 x3 x4.(v_ride(e1) & of(x3,x4) & n_water(x4) & n_slide(x3) & n_girl(x1) & n_dinghy(x2) & down(x2,x3) & card_eq_2(x1) & a_purple(s3) & a_little(s1) & a_inflatable(s2) & Theme(s3,x3) & Theme(s2,x2) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3 x4.(v_squeal(e1) & n_slide(x4) & n_sister(x1) & n_go(x3) & n_delight(x2) & in(e1,x2) & down(x3,x4) & as(x2,x3) & Actor(e1,x1))