51.   The best guess is the fly came loose from its guard, a Chinook scarfed it up and went for a merry fin down river.

52.   The best guess may be compromises.

53.   The best guess now is that he has melanoma, an aggressive skin cancer.

54.   The best guess doctors can give her is that she picked it from her mother, who had active TB eight years ago.

55.   The best guess from this keyboard is that another phase in the evolution of postseason college football will be official before this season starts.

56.   The best guess is made by Public Disclosure Inc., a campaign finance research firm here.

57.   The best guess is that a long process of technological innovation finally reached critical mass, creating new opportunities that American business was uniquely ready to exploit.

58.   The best guess is that Diaz is the second baseman of the future, but Batista is the man of the moment.

59.   The best guess is that for years to come when the Met has a great night, Levine will still most likely be in the pit.

60.   The best guess is that he will to some degree emulate Jimmy Carter, who is more popular as a former president than he was as president.