1.   Harry put on the bedside light and saw the glass of milk, the two biscuits.

2.   He could see six glasses, wine-glasses, on the green and white tablecloth.

3.   Have you seen my glasses floating about anywhere?

4.   He looked up and saw the glasses.

5.   And glasses do you see?

6.   And where Dayton and his mother see the glass as at least half full.

7.   As in most spy cases, the evidence is open to interpretation, some experts seeing the glass half full, others half empty.

8.   All of a sudden the glass is seen as pretty much largely empty.

9.   But at least some research supports the notion that in some cases, it may be more useful to see the glass as half empty.

10.   But for all the frustrating unknowns, many see the glass as half-full.