Cringely: How often do you see an ad on TV for something you're currently in the market for? I'm guessing almost never. Google imagines a world where only single people see match.com ads, and people who can't drive see ads from taxi companies where others see Toyota campaigns. Where fraternities see ads for strip clubs, beer, Cancun weekends and LSAT prep courses, and only seniors (and their adult children) see ads for Alzheimer's drugs.

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