11.   Disagreement also exists about the merits of different treatments.

12.   Far less evidence exists about the side-effects of a series of single vaccines, so there is no reason to assume that they are any safer.

13.   Fish is widely considered to be an excellent source of nutrients, but concerns have long existed about levels of mercury contamination.

14.   Little information exists about how much blacks actually spend with other blacks.

15.   No consensus exists about what constitutes pornography.

16.   No public records exist about the holdings of the Creative Partners Fund.

17.   Of course, only speculation exists about the eerie chad synergy.

18.   Opponents say U.S. tax dollars should not be used to help these young illegal immigrants and that too little information exists about the problem to start discussing solutions.

19.   Several stories exist about the origins of the cake, but it is often credited to the managers of the Charleston, S.C., Lady Baltimore Tea Room.

20.   The issue of police in the schools has been controversial in many minority communities where high levels of suspicion exist about police tactics.