Which linguistic device was specifically employed to create the famous Rosetta Stone language-learning brand slogan 'Language Learning, Pure and Simple'?

Brand slogans are powerful linguistic tools that can make or break a company's identity in the market. The most memorable slogans often employ specific linguistic devices like alliteration, rhyming, metaphors, or cultural references to create lasting impressions. This poll tests your knowledge about the linguistic strategies behind some of the world's most successful language-learning product slogans and how they've shaped brand perception in the competitive language education market.

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Juxtaposition of contradictory concepts (pure vs. complex learning)
Parallelism and assonance (repeated 'L' sounds and vowel patterns)
Cultural reference to the original Rosetta Stone's historical simplicity
Imperative mood command structure (implied 'learn languages')