premise: One man watching another man operate heavy machinery doing road construction.
hypothesis: Two friends are fighting at a construction site.
explanation_1: A man would not be watching the other operate heavy machinery if they are currently fighting.
explanation_2: There can be either one or two.
explanation_3: The two people can either be doing the same thing or one watching the other do a different thing
premise_logic: exists e3 e1 e2 s1 x1 x2 x3 x4 x5 x6.(for(e2,e3) & Theme(e3,x5) & Actor(e3,x1) & v_do(e3) & n_construction(x5) & of(x5,x6) & n_road(x6) & Theme(e2,x4) & Actor(e2,x1) & v_operate(e2) & n_machinery(x4) & a_heavy(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_man(x3) & -(x3 = x1) & n_man(x1) & n_man(x1) & (x1 = x2) & card_eq_1(x1))
hypothesis_logic: exists e1 x1 x2 x3.(at(e1,x2) & n_site(x2) & of(x2,x3) & n_construction(x3) & Actor(e1,x1) & v_fight(e1) & n_friend(x1) & card_eq_2(x1))