11.   Abubakar, who has won praise in the West as a reformer, has at least acknowledged the existence of problems here.

12.   Cast members say she reluctantly acknowledged the existence of the book.

13.   Chen is reluctant to make a grander gesture to Beijing, feeling that the Communist officials have scarcely acknowledged his existence.

14.   Contacted by the Post-Intelligencer, Shaffer declined to discuss the letter or even acknowledge its existence.

15.   Editors, even when their existence is acknowledged, are afterthoughts.

16.   Drexler, for one, has never even acknowledged the existence of the realities of advancing age.

17.   Experts said Monday that the problem of such intra-group rivalry could be solved if school officials acknowledged its existence and took steps to deal with it.

18.   Georgia authorities would not comment on the contents of the diaries, but acknowledged their existence.

19.   He now has the courage to walk in a ghetto and actually utter words acknowledging its existence.

20.   He questions not only the absence of lovemaking and passion, but their willingness to communicate, to solve the problem, to even acknowledge its existence.