21.   But a new study offers a clue to how an experience early in childhood might exert such a powerful and longlasting influence.

22.   But a new study offers a clue to how an experience early in childhood may exert such a powerful and long-lasting influence.

23.   But developers, given the opportunity Friday to question state officials about the credit requirement and other aspects of the bidding, offered no clues to their concerns.

24.   But he has offered no clue how to pay for this.

25.   But he offered no clue as to why they had made the attack.

26.   But he offered no clue as to why they made the attack.

27.   But IBM is not offering any clues as to when that future starts.

28.   But it offers clues to what may lie ahead.

29.   But it certainly offered tantalizing clues, which legions of scientists and graduate students will explore, in the process generating tons of articles, monographs and doctoral dissertations.

30.   But it could offer some clues as to why other less dilute homeopathic remedies work, he says.