The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers.

An internal investigation into an unauthorized disclosure to the news media found they had provided deceptive answers in polygraph examinations about their role in the disclosure.

After the hearing, Ms. Boxer sent a letter to Mr. White saying she found his answers "evasive, deceptive, argumentative, and not helpful in any way."

"It seems probable to me that the terrorists we interrogate under less than humane standards of treatment are also likely to resort to deceptive answers," he wrote.

Coffee said that a person could offer a misleading or deceptive answer, but, if the answer was literally correct, he would not perjure himself.

He answered several of the requests by merely stating the same deceptive answers that he gave to the grand jury.

I have heard only vague explanations for why you chose to delay at Helgrind, and I have had my fill of evasions and deceptive answers.

It is not known what questions prompted deceptive answers.

The officials also quoted the investigators' report as saying that Mr. Marx had given deceptive answers when asked if he had permitted or abetted those actions.