Objectivity, in this sense, means that a person's statements about the world can be trusted if they are submitted to established rules deemed legitimate by a professional community. Facts here are not aspects of the world, but consensually validated statements about it.

Sales may lead to advertising as much as advertising leads to sales.

Different groups are differentially vulnerable to advertising; and their vulnerability varies not so much with the character or quantity of advertisements as with the informational resources they can claim by age, education, station in life, and government guarantees of consumer protection.

The effectiveness of advertising depends on the amount and kind of product information available to consumers... advertising will be more successful the more impoverished the consumer's information environment.

Advertising is much less powerful than advertisers and critics of advertising claim, and advertising agencies are stabbing in the dark much more than they are practicing precision microsurgery on the public consciousness.

It is very likely that many firms spend more on advertising than, for their own best interests, they should.

Chances are that neither the client nor the agency will ever know very much about what role the ad has played in sales or profits of the client, either short-term or long-term.