A man washing windows is suspended outside a building on a seat on a rope with a bucket hanging on the side of the seat .
It is impossible that a window washer is washing windows on a higher floor of a building
It is almost certain that a window washer is washing windows on a higher floor of a building
It is impossible that a window washer is washing windows on a higher floor of a building
A window washer is washing windows on a higher floor of a building