There is a logical explanation for this, the scientist insisted.

"I think scientists will insist on seeing at least a chunk of it," he said.

Jacob thought back to the years of sexual training the scientists had insisted on.

Some social scientists insist that such differences are entirely due to culture.

But scientists insist the disease must be treated as an urgent public health threat.

"And it could lead to important answers," the scientist insisted.

But scientists insist the current approach will eventually succeed.

But Western scientists who recently worked at the plant insist they knew of no nerve gas work.

But that official and scientists working on the project insist the idea shows great potential.

Federal officials and scientists working on the project insist that the idea shows great potential in fighting terrorism.