premise: A man, with a full face mask, sits on a sidewalk playing the guitar.
hypothesis: The man's mask is a clown face
explanation_1: A full face mask does not have to be a clown face.
explanation_2: A man wearing a mask is not necessarily wearing a clown mask.
explanation_3: Not all masks are a clown face.
premise_logic: exists e2 e1 s1 x1 x2 x3 x4 x5.(n_guitar(x5) & for(e1,e2) & Theme(e2,x5) & Actor(e2,x1) & v_play(e2) & on(e1,x4) & n_sidewalk(x4) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_mask(x2) & of(x2,x3) & n_face(x3) & a_full(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists p1 x1 x2.(n_mask(x2) & of(x2,x1) & n_man(x1) & exists s1 x3.((x2 = x3) & n_face(x3) & a_clown(s1) & Theme(s1,x3)))