Which linguistic device is primarily responsible for the memorability and effectiveness of Nike's iconic slogan 'Just Do It'?

Brand slogans are fascinating linguistic artifacts that leverage language features to create memorable, persuasive marketing tools. From phonetic devices like alliteration and rhythm to semantic techniques like metaphor and ambiguity, effective slogans demonstrate sophisticated linguistic principles. This trivia tests your knowledge about the linguistic devices that have made certain product slogans remarkably successful in retail marketing.

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Imperative mood (direct command form)
Assonance (repetition of vowel sounds)
Portmanteau (blending of two words)
Synecdoche (using part to represent whole)