The following are crucial components of lexical phonology:
Lexical and post-lexical rules
Lexical rules …
Apply only within words.
Are prone to exceptions.
Require morphological information.
Must be structure-preserving.
Will not be blocked by pauses.Apply first.
Post-lexical rules …
Apply within words or across word boundaries.
Do not have exceptions.
Require syntactic information, or no grammatical information at all.
Are not necessarily structure-preserving.
Can be blocked by pauses.
Apply later.
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