premise: A man in a green shirt and black hat is smoothing concrete.
hypothesis: He is a construction worker for the city.
explanation_1: Smoothing concrete may  be done by any one , no only a  construction worker.
explanation_2: Just because a man is smoothing concrete doesn't mean he is a construction worker for the city.
explanation_3: Just because a man in a green shirt and black hat is smoothing concrete does not mean he is a construction worker for the city.
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5.(Theme(e1,x5) & Actor(e1,x1) & v_smooth(e1) & n_concrete(x5) & in(x1,x2) & n_hat(x4) & a_black(s2) & Theme(s2,x4) & n_shirt(x3) & a_green(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
hypothesis_logic: exists p1 x1 x4.(n_city(x4) & n_male(x1) & exists x2 x3.((x1 = x2) & for(x2,x4) & n_worker(x2) & of(x2,x3) & n_construction(x3)))
premise_sim: exists e1 s1 s2 x1 x2 x3 x4 x5.(v_smooth(e1) & subset_of(x4,x2) & subset_of(x3,x2) & n_shirt(x3) & n_man(x1) & n_hat(x4) & n_concrete(x5) & in(x1,x2) & a_green(s1) & a_black(s2) & Theme(s2,x4) & Theme(s1,x3) & Theme(e1,x5) & Actor(e1,x1))
hypothesis_sim: exists x1 x4.(n_male(x1) & n_city(x4) & exists x2 x3.(of(x2,x3) & n_worker(x2) & n_construction(x3) & for(x2,x4) & (x1 = x2)))