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How did Noam Chomsky’s later theories change the role of deep structure and surface structure?
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Noam Chomsky
American linguist and philosopher Noam Chomsky, 2010.
In Noam Chomsky’s early work, such as Aspects of the Theory of Syntax, grammar relied on two distinct levels: deep structure, where semantic interpretation occurred, and surface structure, which served as the basis for phonetic interpretation.12
As his theories evolved, the role of these structures changed significantly:
- Shift in Semantic Interpretation: In later theories, deep structure ceased to be the designated locus for semantic interpretation.1
- Elimination of Structures: By the late 1970s, phrase-structure grammars were largely replaced by X-bar theory, which projected lexical properties into complex structures. Transformations were simplified into a single operation known as "Move α" (Move alpha).1
- Disappearance in the Minimalist Program: With the introduction of the minimalist program in the early 1990s, both deep and surface structures were eliminated entirely. These were replaced by simpler operations, specifically "internal Merge" and "external Merge," which remain central to his current efforts to construct grammars.1
Ultimately, these changes reflect a move toward greater formal elegance and simplicity, aiming to better align linguistic theory with biological science.1