Which 1950s advertising slogan broke new ground by acknowledging product limitations while building consumer trust?

Throughout history, certain advertising slogans have become so iconic that they've transcended their original products to become part of our cultural lexicon. These powerful phrases not only boosted sales but often reflected and shaped the values of their eras. This trivia question focuses on a particularly revolutionary slogan from the mid-20th century that challenged societal norms and helped redefine a brand's relationship with its customers.

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Volkswagen's 'Think Small' (1959)
De Beers' 'A Diamond is Forever' (1948)
Maxwell House's 'Good to the Last Drop' (1959 version)
Coca-Cola's 'The Pause That Refreshes' (1957 campaign)