premise: A group of seven individuals wearing rafting gear, white water raft down a river.
hypothesis: The man has fallen out of the boat.
explanation_1: "The man" implies one person not seven people.
explanation_2: A man is not a group.  A boat is not a raft.
explanation_3: A group of seven individuals can not be comprised of one man.
premise_logic: exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & rel(x4,x6) & down(x6,x8) & n_river(x8) & n_raft(x6) & of(x6,x7) & n_water(x7) & a_white(s1) & Theme(s1,x6) & n_gear(x4) & of(x4,x5) & n_rafting(x5) & (x2 = x3) & n_individual(x2) & card_eq_7(x2) & n_group(x1))
hypothesis_logic: exists e1 x1 x2.(n_boat(x2) & n_man(x1) & r_out(e1) & of(e1,x2) & Actor(e1,x1) & v_fall(e1))