premise: An old gray-haired man with glasses in a gray t-shirt is working on a sculpture.
hypothesis: The man is old
explanation_1: Older people are gray-haired, so an older man would have gray hair.
explanation_2: The phrase "man is old" is another way of saying "old gray-haired man".
explanation_3: He is old because he is an old gray-haired man.
premise_logic: exists e1 s1 s2 s3 x1 x2 x3 x4.(on(e1,x4) & n_sculpture(x4) & Actor(e1,x1) & v_work(e1) & with(x1,x2) & in(x2,x3) & n_t-shirt(x3) & a_gray(s3) & Theme(s3,x3) & n_glass(x2) & n_man(x1) & a_gray-haired(s2) & Theme(s2,x1) & a_old(s1) & Theme(s1,x1))
hypothesis_logic: exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_old(s1))