21.   Capt. Leroy A. Farr, the base commander, said his best guess was that the change would be accomplished by the end of the decade.

22.   Colangelo said Wednesday that is his best guess right now.

23.   Every coming year, in prospect, is a best guess, an unknown and unknowable quantity.

24.   FBI analysts have said that their best guess was the terrorist was most likely a man who worked in a laboratory or had a scientific background.

25.   He will have to do it himself, and the best guess is that he cannot.

26.   If the equity premium has endured for seven decades, the reasoning goes, the best guess is that it will endure for many more.

27.   In fact, the best guess is that they already do.

28.   In retrospect, he figures that the information was a best guess warm-up by the people who run the Oscar Web site in preparation for the actual release.

29.   Indeed, the best guess is that within a couple of hours of the polling stations closing, Milosevic will claim victory, however people vote.

30.   It is lifted off the ground and horizontal, not dragging, which is now the best guess by paleontologists of how things really were.