On the Tube, an ad for Rennie Dual Action Tablets – they alleviate heartburn and indigestion. The slogan accompanying the image of someone’s stomach seen through their tee-shirt is ‘No Dual Action Product Works Faster’. This is, for a few seconds, confusing. The ad seems to be suggesting that, compared, say, to Single Action Products, no Dual Action Product Works Faster. Or, indeed, that It Is Better not to take Dual Action Products because no Dual Action Product Works Faster.