176 Michael Fortescue
ple, a left-to-right elaboration of an interpersonal level structure would re-
quire very little reference to expression-level categories (parts of speech and
syntactic phrase units) at all. All the relevant triggers for expression are ar-
guably there at the interpersonal level (interacting with the lexicon). The
only involvement of the representational level in production would in turn
be in decisions to construe the propositional content in terms of first-order
or higher-order terms and/or bare predicates – in other words as nominal or
verbal expressions (this, as we have seen, being determinate and overt if in-
flectional suffixes are present). Languages can no doubt be typologized as
regards the degree of relevance of the two lower levels for produc-
tion/comprehension decisions. These would, at all events, appear to be more
language-specific than those at the interpersonal level.References
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