premise: An old black man sitting on a couple of grocery crates playing the string guitar during the day.
hypothesis: Every instrument visible is a woodwind.
explanation_1: The instrument is either a string guitar or it is a woodwind.
explanation_2: The instrument can't be both string and woodwind
explanation_3: If every instrument visible is a woodwind then a string guitar can not be present.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_day(x9) & n_guitar(x7) & of(x7,x8) & n_string(x8) & a_topic(x1) & on(e1,x3) & during(e2,x9) & Theme(e2,x7) & Actor(e2,x6) & v_play(e2) & (x3 = x6) & of(x3,x4) & n_crate(x4) & of(x4,x5) & n_grocery(x5) & n_couple(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & a_black(s2) & Theme(s2,x1) & a_old(s1) & Theme(s1,x1))
hypothesis_logic: all x1.(n_instrument(x1) -> exists p1 s1 x2.(exists x3.((x1 = x3) & n_woodwind(x3)) & Theme(s1,x2) & a_visible(s1) & (x1 = x2)))