premise: A man with no shirt on is holding a football.
hypothesis: A man poses for a photo with a football.
explanation_1: The first sentence could be interpreted as the man playing football shirtless, but the second clarifies that he is posing for a photo.
explanation_2: the man poses for a photo does not mean he doesn't have to have his shirt on
explanation_3: Holding a football doesn't imply posing for a photo.
premise_logic: exists x1.(-exists e1 s1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_hold(e1) & n_football(x4) & with(x1,x2) & Theme(s1,x3) & a_on(s1) & (x2 = x3) & n_shirt(x2)) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(for(e1,x2) & with(x2,x3) & n_football(x3) & n_photo(x2) & Actor(e1,x1) & v_pose(e1) & n_man(x1))