premise: A swimming dog with a small branch in its mouth.
hypothesis: A dog is ice skating.
explanation_1: A dog that is swimming cannot also be ice skating.
explanation_2: A dog can not swim and ice skate at the same time.
explanation_3: Swimming and ice skating cannot be performed at the same time.
premise_logic: exists s1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & in(x3,x4) & n_mouth(x4) & of(x4,x1) & n_thing(x1) & n_branch(x3) & a_small(s1) & Theme(s1,x3) & n_dog(x1) & of(x1,x2) & n_swimming(x2))
hypothesis_logic: exists p1 x1.(exists x2 x3.((x1 = x2) & n_skating(x2) & of(x2,x3) & n_ice(x3)) & n_dog(x1))