Such statistical use is possible only if usable records are maintained. A basic item-by-item file of all important or new items, combined with a worksheet of the amount of radio time or printed space the enemy put into use for a stated period, will provide the materials needed for propanal. Propanal is indispensable to psychological warfare. It sifts ordinary intelligence out from propaganda in one process, processing straight intelligence ready for the intelligence people to use, yet providing analysis for psychological warfare purposes. For peacetime purposes, it is to be remembered that though enemies may hide their scientists, their launching ramps, or their rockets, they cannot hide the occasion for war, nor their own readiness measures. No government can afford to seem the plain unqualified aggressor. _Propanal_ may prove to be one of the soundest war-forecasting systems available to us in a period of ultra-destructive weapons. Psychological mobilization may be disguised: it cannot be concealed. CHAPTER 8 Propaganda Intelligence The psychological warfare operator can usually count on two basic interests of his listener. In the field he can be sure that the enemy troops are interested in themselves. In the enemy homeland he can be sure that the civilians are interested in _their_ enemy--himself. He has therefore a certain leeway in which he can be sure of doing no harm, and may accomplish good, if he confines his propaganda to simple, factual and plainly honest statements on these subjects. Pompousness, intricacy and bad taste will recoil against him; it is unwise to employ these even when the situation is well under control. In a developing situation the propagandist can remain safe by confining himself to simple statements as to how strong his country's armed forces are, how realistic and effective their leadership. Elementary information giving the favorable aspects of his economic, strategic and diplomatic situation may also prove valuable initial propaganda.