A man is hiking on a mountaintop on a cloudy day.
The sky is clear and blue.
A cloudy day can not have a sky that is clear and blue.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_day(x3) & a_cloudy(s1) & Theme(s1,x3) & on(e1,x2) & n_mountaintop(x2) & Actor(e1,x1) & v_hike(e1) & n_man(x1))
exists s1 s2 x1.(n_sky(x1) & Theme(s2,x1) & a_blue(s2) & Theme(s1,x1) & a_clear(s1))