11.   He said later that the men had also fought in the war in Afghanistan, but he offered no definitive evidence.

12.   In addition, they stress that they do not have definitive evidence that al-Qaida has actually produced the cyanide gas at Derunta.

13.   In months and years to come, the scientific community will continue to study the small Martian meteorite found in Antarctica, hoping for more definitive evidence of life.

14.   More definitive evidence of how each victim died and whether there are hidden clues may come when pathologists look though microscopes at pieces of tissue removed at autopsy.

15.   Now the first definitive evidence that men and women use their brains differently has come from a study involving rhymes.

16.   Other researchers are not so certain that the type of definitive evidence many archaeologists demand will ever be found.

17.   Only nobody has ever supplied any definitive evidence that Lee Harvey Oswald was anything but a solo act.

18.   The telescope has provided the most definitive evidence yet for the existence at the core of a galaxy of a dense gravitational mass called a black hole.

19.   There is still no definitive scientific evidence that the cow disease, technically known as Bovine Spongiform Encephalopathy, can be passed to humans.

20.   There is no definitive evidence that the care at Columbia is better or worse than that provided elsewhere.