In discussion we have tried to identify this level as semantic compositionality -an interpretation which, besides being supported by results from language processing (Pulman, 1985;Steedman, 2000;Moseley and Pulvermüller, 2014), has interesting implications on NL structure and modeling.
it may reduce syntax and morphology to word and morpheme orders, respectively (with the syntaxsemantics and phonology-morphology interfaces reducing correspondingly), with NL architecture taking on a rather different look.