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JeanWagner’mostsenduringcontributiontothestudyofAfro-Americanpoetryishisinsistencethatit________inareligious,aswellasworldly,frameofreference.
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Accordingtothe"principles-and-parameters"theory,"principles"refertohighlyabstractpropertiesofgrammarwhichareappliedtolanguageingeneralandwhichgeneratephrasesandatthesametimerestrainthepowerofMovea,while"parameters"allowgeneralprinciplestooperateincertainrestrictedways,accordingtowhichparticulargrammarsofnaturallanguagesvary.