The tobacco industry promotes friendly "experts" and uses public relations tactics to produce uncertainty around research results that threaten it. This inhibits public policies responsive to these research findings. These tactics, long used agninst medical science, are now being used to counter the studies challenging to the myth that cigarette advertising is of no import. The numerous weaknesses of the industryadvanced argument are discussed, drawing particularly on the literature of consumer behavior; marketing, and advertising. The vast preponderance of evidence indicates that cigarette advertising plays a meaningful role in influencing the perceptions, attitudes, andsmoking behavior of youth. Denials ofthese effects, without brand new and compelling evidence, are highly suspect."The other side is engaging in a reckless campaign of propaganda, mistruths, half'truths, innuendo, false piety and downright deceit."