In Part 2, we explored the emergence of a semantic stratum: meaning began to exist independently of signal forms, organised into proto-ideational, interpersonal, and textual fields. The system now supports structured construal, guiding the selection of signals in interaction.
The final step in stratification is the emergence of lexicogrammar and phonology, the strata that realise meaning and encode it reliably for transmission.
Lexicogrammar: structuring form to realise meaning
Lexicogrammar arises as the system of patterns that mediates between semantic potential and actual signals:
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It provides conventionalised ways to encode relations identified in the semantic stratum.
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Patterns of word order, inflection, and morphology emerge to make selections predictable and interpretable.
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Lexicogrammar allows different forms to realise the same meaning, and conversely, the same form to realise different meanings in context.
At this stage, language becomes truly productive: sequences can be recombined systematically without ambiguity, enabling novel expressions and complex discourse.
Phonology: encoding patterns for transmission
Phonology (or gestural/visual equivalents) provides the material realisation of lexicogrammatical patterns:
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Distinctive sounds or gestures encode differences among lexicogrammatical elements.
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Phonotactic rules stabilise sequences to prevent misinterpretation.
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Redundancy, rhythm, and prosody enhance reliability across participants and contexts.
Phonology ensures that structured meaning can persist and propagate, completing the chain from abstract semantic potential to perceivable signal.
The full Hallidayan strata in place
At this point, the Hallidayan architecture is fully operational:
| Stratum | Function |
|---|---|
| Context | Field, tenor, mode – realised by semantics |
| Semantics | Structured meaning potential – guides selection of lexicogrammar |
| Lexicogrammar | Conventional patterns – realise semantic selections |
| Phonology | Material forms – realise lexicogrammar patterns reliably |
Each stratum is a structured potential and a theory of instances. Meaning is now fully stratified, productive, and relational.
From stratification to reflexive semiosis
With stratification in place, language achieves the capacity to reflect on itself:
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Patterns of meaning can be observed, analysed, and manipulated.
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Participants can construe not only events and relations in the world but also the meanings of meanings.
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Reflexive semiosis becomes possible, paving the way for abstract thought, theory, and meta-semiotic systems.
Stratification transforms early protolanguage sequences into a robust semiotic infrastructure, capable of supporting culture, knowledge, and the recursive construction of meaning itself.
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