premise: A black dog and a goose swim in the water.
hypothesis: The goose has something in its mouth.
explanation_1: There is no indication the goose from sentence one has anything in its mouth or the goose from sentence two is in the water.
explanation_2: Not all dogs swim with goose.
explanation_3: Geese don't always have something in the mouth.
premise_logic: exists s1 s2 x1 x2 x3 x4.(n_water(x4) & a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_swim(x2) & of(x2,x3) & n_goose(x3) & subset_of(x1,s1) & n_dog(x1) & a_black(s2) & Theme(s2,x1))
hypothesis_logic: exists e1 x1 x2 x3.(n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_goose(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_thing(x2))