In an era where AI can access, memorize, and accurately quote all original texts, where doeshuman intellectual value lie? This paper proposes the concept of "Context Decoding"—acognitive capacity to reconstruct not the literal meaning of texts, but the historicalcircumstances, ideological conflicts, and social conditions from which they emerged, usingone's cross-disciplinary knowledge and lived experience as decryption keys. We argue that thiscapacity, distinct from close reading of primary sources, constitutes the core intellectualactivity humans should undertake in the age of AI. While AI excels at textual fidelity, itfundamentally cannot perform context decoding because it lacks embodied existence, temporalsituatedness, and the ability to use biographical experience as an interpretive lens. Thisrepresents not a limitation to be overcome, but a permanent asymmetry that defines thehuman-AI intellectual division of labor.