81.   The authors said that the operation had not been standardized and that different surgeons were using different techniques, without a definitive answer as to which worked best.

82.   The diary gives no definitive answer as to whether Ms. Lebov wanted to die.

83.   The film never supplies a definitive answer.

84.   The study was well-done, but clinical trials using randomly selected groups are needed for definitive answers, he said.

85.   There are few definitive answers now.

86.   There are no definitive answers, only opinions.

87.   There is no definitive answer, in part because the initial symptoms of influenza, anthrax and other infections can resemble one another.

88.   There is no definitive answer to your question, so do whatever helps you sleep most soundly.

89.   There is no definitive answer.

90.   There were no definitive answers.