61.   Pros and cons are complicated and many details remain to be clarified.

62.   Several people close to Luongo said the sides had reached an agreement in principle since then, though many details remain open.

63.   Some details remain to be filled in and there were warning of possible last-minute problems.

64.   Some details remain unclear, but the arrangement could dangerously blur the distinction between testing and the fielding of an operational system.

65.   Some details remain unknowable.

66.   Some details remained unclear Monday.

67.   So the details of some remain unknown.

68.   Specific terms of the agreement were not revealed because some details remain to be worked out.

69.   Stanford University News Service director Douglas Foster said that a few details remain to be worked out and that the money issue has not yet been settled.

70.   Some details remain fuzzy.