premise: A person floating on a river near a metropolitan area.
hypothesis: A man floating on a river near a metropolitan area.
explanation_1: A person does not have to be a man.
explanation_2: We have no idea if the person is a man, they could also be a woman.
explanation_3: Just because a person floating on a river near a metropolitan area, it doesn't mean this person is a man.
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & near(x3,x4) & n_area(x4) & a_metropolitan(s1) & Theme(s1,x4) & n_river(x3) & Actor(e1,x2) & v_float(e1) & (x1 = x2) & n_person(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & near(x3,x4) & n_area(x4) & a_metropolitan(s1) & Theme(s1,x4) & n_river(x3) & Actor(e1,x2) & v_float(e1) & (x1 = x2) & n_man(x1))