In Linebarger's book Psychological Warfare, he points out that asking propaganda men (in his defense, they probably were almost all men ca. 1947, and I suspect he may even have referred to specific men, eg Edward Bernays) about their work is highly unlikely to result in an unspun answer.
(then again, consider Epimenides: Linebarger is also a propaganda man)
In Linebarger's book Psychological Warfare, he points out that asking propaganda men (in his defense, they probably were almost all men ca. 1947, and I suspect he may even have referred to specific men, eg Edward Bernays) about their work is highly unlikely to result in an unspun answer.
(then again, consider Epimenides: Linebarger is also a propaganda man)
guess you'll have to listen!