1.   Strictly speaking, there is as yet no definitive evidence for Declining sperm counts.

2.   Although there is no definitive scientific evidence, some specialists say a deep massage breaks scar tissue and improves muscle mobility.

3.   Although the debate surrounding viruses continues, there is some definitive evidence that outside agents can cause autism.

4.   But Blumberg worries about waiting for so-called definitive evidence.

5.   But the find is being touted as the first definitive evidence that at least some dinosaurs were caring parents.

6.   But there had been no definitive evidence that ozone in the real environment stunted mature trees.

7.   But they have had trouble convincing people because investigators have conceded that they lack definitive evidence either way.

8.   Definitive evidence will probably come only with the return of Mars rock samples.

9.   Despite a lack of definitive scientific evidence tying breast implants to serious disease, juries awarded millions of dollars in compensatory and punitive damages against the company.

10.   Five years down the road, there is little definitive evidence that the overhaul is working.