premise: A dog holding a Frisbee walking in the water.
hypothesis: The dog has nothing in its mouth.
explanation_1: The dog can't be holding a Frisbee and have nothing in his mouth.
explanation_2: A dog can only hold something in its mouth so he can't be holding a frisbee anywhere but in its mouth.
explanation_3: The dog cannot hold nothing and have a Frisbee in its mouth at the same time.
premise_logic: exists e1 x1 x2 x3 x4 x5.(n_water(x5) & a_topic(x1) & in(e1,x5) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_walking(x3) & (x3 = x4) & ne_org_frisbee(x4) & (x1 = x2) & n_dog(x1))
hypothesis_logic: exists x1 x3.(n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_dog(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_thing(x2)))