Summary and Keywords
The Lexical Integrity Hypothesis (LIH) holds that words are syntactic atoms, implying that syntactic processes and principles do not have access to word segments. Interestingly, when this widespread “negative characterization” is turned into its positive version, a standard picture of the Morphology-Syntax borderline is obtained.
The LIH is both a fundamental principle of Morphology and a test bench for morphological theories. As a matter of fact, the LIH is problematic for both lexicalist and anti-lexicalist frameworks, which radically differ in accepting or rejecting Morphology as a component of grammar different from Syntax. Lexicalist theories predict no exceptions to LIH, contrary to fact. From anti-lexicalist theories one might expect a large set of counterexamples to this hypothesis, but the truth is that attested potential exceptions are restricted, as well as confined to very specific grammatical areas. Most of the phenomena taken to be crucial for evaluating the LIH are briefly addressed in this article: argument structure, scope, prefixes, compounds, pronouns, elliptical segments, bracketing paradoxes, and coordinated structures. It is argued that both lexicalist and anti-lexicalist positions crucially depend on the specific interpretations that their proponents are willing to attribute to the very notion of Syntax: a broad one, which basically encompasses constituent structure, binary branching, scope, and compositionality, and a narrow one, which also coverts movement, recursion, deletion, coordination, and other aspects of phrase structure. The objective differences between these conceptions of Syntax are shown to be determinant in the evaluation of LIH’s predictions.
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