premise: A man in a red shirt and a man in a brown shirt smiling at the camera and holding up a sign.
hypothesis: Two men are throwing rocks at policemen.
explanation_1: The men can either be throwing rocks at policemen or smiling at the camera and holding up a sign.  Not both
explanation_2: Two men are not a man.
explanation_3: The biggest difference here is the supposed tone of the personalities of the subjects. In the one there a man holding a sign is a supposed peaceful demonstration. In the other the men are throwing rocks and appear to be angry. You cannot be peaceful and angry at the same time. There is also a difference in number of people. One man is not the same as two men in number.
premise_logic: exists e2 e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8.(n_camera(x6) & a_topic(s1) & a_up(s4) & Manner(e2,s4) & Theme(e2,x8) & Actor(e2,x7) & v_hold(e2) & n_sign(x8) & (s1 = x7) & at(e1,x6) & Actor(e1,x5) & v_smile(e1) & (s1 = x5) & subset_of(x3,s1) & in(x3,x4) & n_shirt(x4) & a_brown(s3) & Theme(s3,x4) & n_man(x3) & subset_of(x1,s1) & in(x1,x2) & n_shirt(x2) & a_red(s2) & Theme(s2,x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(at(e1,x3) & n_policeman(x3) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_rock(x2) & n_man(x1) & card_eq_2(x1))