premise: A man in a hard hat and orange safety vest works on a machine in smoky air.
hypothesis: A man is working on a machine.
explanation_1: A man that works on a machine is surely working on a machine.
explanation_2: Works is the same as working.
explanation_3: The man that works on a machine can be missing details of wearing a "hard hat" and "safety vest."
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(in(e1,x8) & n_air(x8) & a_smoky(s2) & Theme(s2,x8) & on(e1,x7) & n_machine(x7) & Actor(e1,x1) & v_work(e1) & in(x1,x2) & n_vest(x4) & of(x4,x6) & n_safety(x6) & of(x4,x5) & n_orange(x5) & n_hat(x3) & a_hard(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(on(e1,x2) & n_machine(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))
premise_sim: exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(v_work(e1) & subset_of(x4,x2) & subset_of(x3,x2) & on(e1,x7) & of(x4,x6) & of(x4,x5) & n_vest(x4) & n_safety(x6) & n_orange(x5) & n_man(x1) & n_machine(x7) & n_hat(x3) & n_air(x8) & in(x1,x2) & in(e1,x8) & a_smoky(s2) & a_hard(s1) & Theme(s2,x8) & Theme(s1,x3) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_work(e1) & on(e1,x2) & n_man(x1) & n_machine(x2) & Actor(e1,x1))