premise: A man in a navy polo shirt snaps photos at a golf course while a crowd of spectators looks on in the background.
hypothesis: A man in black is singing on stage.
explanation_1: The man is either wearing navy or black; he either snaps photos or is singing, and he is either at a golf course or on stage.
explanation_2: Black is not navy.  If a man snaps photos at a golf course then he is not singing on stage.
explanation_3: navy doesn't mean black
premise_logic: exists e1 p1 x1 x2 x3 x4 x5 x6 x7 x10.(n_background(x10) & exists e2 x8 x9.(r_on(e2) & in(e2,x10) & Actor(e2,x8) & v_look(e2) & of(x8,x9) & n_spectator(x9) & n_crowd(x8)) & while(e1,p1) & at(e1,x6) & n_course(x6) & of(x6,x7) & n_golf(x7) & Theme(e1,x5) & Actor(e1,x1) & v_snap(e1) & n_photo(x5) & in(x1,x2) & n_shirt(x2) & of(x2,x4) & n_polo(x4) & of(x2,x3) & n_navy(x3) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_sing(e1) & in(x1,x2) & n_black(x2) & n_man(x1))