An older man wearing a white shirt with a black tie and a black cap is standing on the street.
The man was unsure whether to dress formally or casually, so did a bit of both.
Wearing a shirt, tie, and cap does not mean somebody was unsure whether to dress formally or casually.  Wearing a shirt, tie, and cap does not mean that a person is dressed both formally and casually.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7.(n_street(x7) & on(e2,x7) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & with(x3,x4) & subset_of(x6,x4) & n_cap(x6) & a_black(s4) & Theme(s4,x6) & subset_of(x5,x4) & n_tie(x5) & a_black(s3) & Theme(s3,x5) & n_shirt(x3) & a_white(s2) & Theme(s2,x3) & (x1 = x2) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists p1 s1 x1.(n_man(x1) & exists e1 p2 x2 x3.(while(e1,p2) & r_so(e1) & Actor(e1,x2) & v_do(e1) & of(x2,x3) & n_thing(x3) & n_bit(x2) & (exists e2 s2 x4.(a_formally(s2) & Manner(e2,s2) & Actor(e2,x4) & v_dress(e2) & n_thing(x4)) | exists e3 s3 x5.(a_casually(s3) & Manner(e3,s3) & Actor(e3,x5) & v_dress(e3) & n_thing(x5)))) & whether(s1,p1) & Theme(s1,x1) & a_unsure(s1))