What is the “all and only” criterion?, It means that a grammar must generate all grammatical structures and only grammatical structures., Phrase structure rules, Rules that represent the underlying or deep structure of sentences., NP→{Art (Adj) N, Pro, PN}, The small boy, PP→Prep NP, near London, Recursion, Rules that have the capacity to be applied more than once in generating a structure, Structural ambiguity, One surface structure has two different underlying interpretations., Movement rule, It moves one part of a structure to a different position., { }, One and only one option must be selected., *, ungrammatical structure, ( ), optional constituent

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