premise: the man in jeans is sitting by the river with large fish.
hypothesis: A man in jeans is sitting by a river with large koi fish.
explanation_1: All large fish don't have to be koi.
explanation_2: You can not infer there is a koi fish.
explanation_3: A man is not necessarily the man.
premise_logic: exists e1 s1 x1 x2 x3 x4.(n_river(x3) & n_man(x1) & with(e1,x4) & n_fish(x4) & a_large(s1) & Theme(s1,x4) & by(e1,x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_jeans(x2))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4 x5.(with(e1,x4) & n_fish(x4) & of(x4,x5) & n_kous(x5) & a_large(s1) & Theme(s1,x4) & by(e1,x3) & n_river(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_jeans(x2) & n_man(x1))