premise: A black dog in front of a waterfall.
hypothesis: A dog is dancing while it rains.
explanation_1: One is a waterfall and one is rain.
explanation_2: The dog can not be dancing in front of a waterfall.  (most plausible)
explanation_3: The dog is either in front of a waterfall or it is in the rain, but not both.
premise_logic: exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & of(x2,x3) & n_waterfall(x3) & n_front(x2) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 p1 x1.(exists e2.(Actor(e2,x1) & v_rain(e2)) & n_thing(x1) & while(e1,p1) & Actor(e1,x1) & v_dance(e1) & n_dog(x1))