Advertising (n.) is A premium paid by the public for buying products it doesn't want.
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Advertising (n.) is The art of making people think they've always wanted something they've never even heard of before.
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Advertising (n.) is like marriage: there may be a better way, but what is it? Advertising is usually a trick to get you to spend money by telling you how much you can save.
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Advertising (n.) is the only kind of news found in the daily papers that's always on the bright side.
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Advertising (n.) is vital to business — if your business is not worth advertising, then advertise it for sale.