"They have infallible methods they have developed over the centuries.

"You spoke at lunchtime, I believe, of one infallible method of detecting crime.

So now the pill has been abandoned as unsafe and we have infallible methods for determining the exact time of ovulation.

"Apparently," Spock said expressionlessly, "she has worked out an infallible method for ensuring male fidel-ity.

However, I am surprised that he failed to mention persistent bed-wetting which, in my experience, was the one absolutely infallible method of obtaining release from military service.

On this subject, however, Byrd proved loquacious: "Our ancestors thought they had an infallible method, based on the eclipses of the moon.

Since Descartes, practical judgment and reasoning have been treated with less respect because of the demand for greater certainty and an infallible method to justify beliefs.

Officials of both the Carter Center and the Organization of American States say the audit is an infallible method of detecting irregularities.

The purser was telling them of an infallible method of calculating the height of waves by simple triangulation when Hervey plunged into the gunroom, spouting water like an inverted fountain.

"...there was one infallible method of convincing a reluctant Japanese prisoner to tell all he knows: to tell him, via interpreters, that they will send his name and picture back to Japan.

"There is one infallible method of determining human guilt and responsibility," Vance explained; "but as yet the police are as blissfully unaware of its possibilities as they are ignorant of its operations.

LEAD: Forty years ago, when all the world went to the movies on Saturday nights, the famous producer Harry Cohn told a tableful of screenwriters his infallible method for separating moneymakers from clinkers.

His chief work is Nature displayed in her mode of teaching Language to Man; being a new and infallible Method of acquiring Languages with unparalleled rapidity; deduced from the analysis of the human mind, and consequently suited to every capacity: adapted to the French.

Although the Department of Veterans Affairs' Office of the Inspector General subsequently supported these results in their own study, others have challenged the use of official military records as an infallible method of corroborating combat exposure in support of a PTSD diagnosis.