A child is wearing a blue knitted hat.
A boy is bald.
The boy cannot be simultaneously bald and wearing a hat (in which case we wouldn't know he was bald)
exists e2 e1 s1 x1 x2.(Theme(e2,x2) & Actor(e2,x1) & v_wear(e2) & n_hat(x2) & Theme(e1,x2) & v_knit(e1) & a_blue(s1) & Theme(s1,x2) & n_child(x1))
exists s1 x1.(Theme(s1,x1) & a_bald(s1) & n_boy(x1))