premise: A roofer in a gray sweatshirt and orange hat walks on a unfinished roof at a lake-side home.
hypothesis: The man is fixing a bike.
explanation_1: It would be very odd for a roofer to be fixing a bike on the roof.
explanation_2: The man cannot be fixing a bike and walks on a roof at the same time.
explanation_3: The first sentence is about a man who fixes roofs for a living. The second sentence is about a man who knows how to fix a bike. Two different actions.
premise_logic: exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(on(e1,x6) & at(x6,x7) & n_home(x7) & a_lake-side(s3) & Theme(s3,x7) & n_roof(x6) & a_unfinished(s2) & Theme(s2,x6) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_hat(x4) & of(x4,x5) & n_orange(x5) & n_sweatshirt(x3) & a_gray(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_roofer(x1))
hypothesis_logic: exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_bike(x2))