premise: A man is riding on the back of a garbage truck.
hypothesis: A man saves money by hitching a ride on a garbage truck.
explanation_1: The man may not be saving any money by hitching a ride on a garbage truck, it is more likely that he is a garbageman
explanation_2: Just because a man is riding on the back of a garbage truck doesn't mean he is saving money by doing so he could simply be working.
explanation_3: A man riding on the back of a garbage truck does not imply that he is hitching for a ride, and because a man is riding with a garbage truck does not imply he is doing that to save money.
premise_logic: exists e1 x1 x2 x3 x4.(n_back(x2) & on(e1,x2) & of(x2,x3) & n_truck(x3) & of(x3,x4) & n_garbage(x4) & Actor(e1,x1) & v_ride(e1) & n_man(x1))
hypothesis_logic: exists e2 e1 x1 x2 x3 x4 x5.(by(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hitch(e2) & on(x3,x4) & n_truck(x4) & of(x4,x5) & n_garbage(x5) & n_ride(x3) & Theme(e1,x2) & Actor(e1,x1) & v_save(e1) & n_money(x2) & n_man(x1))