premise: A man in a hard hat and orange safety vest works on a machine in smoky air.
hypothesis: An old man in a hard hat and orange safety vest works on a yellow maching in smokey air.
explanation_1: because it did not say that the man was old or the color of the machine was yellow
explanation_2: Not all men in hard hats are old. All machines are not yellow.
explanation_3: All men are not old.  All machines are not yellow.
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 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9.(on(e1,x7) & in(x7,x8) & n_air(x8) & of(x8,x9) & n_smokey(x9) & n_maching(x7) & a_yellow(s3) & Theme(s3,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(s2) & Theme(s2,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))