11.   Breeders point out that critics lack any hard data that shows releases have damaged wild butterflies.

12.   But by the time you get hard data points the stocks have already moved.

13.   But hard data on the effectiveness of Web sites remains elusive.

14.   But many demographers, patient people who find comfort in hard data, are skeptical of an upsurge of any consequence.

15.   But in scientific fields that have long been starved for hard data, experiments have a habit of springing surprises.

16.   But nutritionists say hard data on the simple food craving will probably remain elusive until a link between cravings and weight loss can be more firmly established.

17.   But promising as it sounds, hard data on the effectiveness of lymph drainage massage are scarce, says Slavin of Beth Israel.

18.   But some people worried that the Police Department was making the decision without sufficient public discussion or hard data.

19.   But until now, scientists have had little hard scientific data to guide them in how and where to best set up such reserves.

20.   County supervisors and environmental health officials based their decision to target restaurant not on any hard data but because of the sensational television report.