The previous essay proposed that significance may not be a single phenomenon.
We distinguished between existential significance, which concerns what matters from the perspective of a living system, and semantic significance, which concerns the organisation of meaning within symbolic systems.
The distinction immediately raises a further question.
If semantic significance is not merely borrowed from existential significance, what exactly is it?
How does meaning become organised?
To answer this question, few thinkers provide richer guidance than M.A.K. Halliday.
Although Halliday did not formulate the distinction proposed in this series, his account of language offers perhaps the clearest description of semantic significance that linguistics has yet produced.
Language Is Not a Dictionary
Language is often imagined as a vast collection of names.
Words label objects.
Sentences describe events.
Communication consists of transferring these labels from one mind to another.
Halliday rejected this picture.
Language does not simply name the world.
Nor does it merely report experience.
Language construes experience.
This apparently modest claim has profound consequences.
To construe is not simply to record.
It is to organise.
Experience does not arrive already divided into neat conceptual categories.
Language provides resources through which distinctions become available.
The world does not merely become describable.
It becomes increasingly meaningful.
Meaning Exists in Systems
This point is easily overlooked.
It is tempting to imagine meanings residing inside individual words.
Yet a word possesses remarkably little meaning in isolation.
Consider the word mother.
Its significance depends upon relationships.
Mother implies child.
Parent implies family.
Family implies social relationships.
Social relationships imply culture.
Culture implies systems of obligation, affection, authority and identity.
Meaning therefore emerges not from isolated symbols but from networks of relations.
Halliday repeatedly emphasised this systemic character of language.
Language is not a bag of words.
It is a system of choices.
Each choice acquires significance because alternative choices were available.
Semantic significance therefore arises through organised possibility.
Meaning Is Difference
One consequence follows immediately.
Meaning depends upon distinction.
A language distinguishes past from present.
It distinguishes request from command.
It distinguishes certainty from possibility.
These distinctions are not merely grammatical curiosities.
They provide ways of construing experience.
A language that distinguishes several forms of obligation enables speakers to organise social relationships differently from one that does not.
A language that distinguishes subtle emotional states enables experiences themselves to become increasingly differentiated.
Semantic significance therefore consists, not simply in possessing words, but in possessing systems of meaningful contrast.
The architecture of meaning is built from difference.
The Expansion of Possibility
Seen in this light, language performs a remarkable function.
It continually expands the possibilities available for interpretation.
A child initially experiences discomfort.
Gradually, language offers distinctions.
Hunger.
Tiredness.
Loneliness.
Embarrassment.
Frustration.
Disappointment.
Regret.
These words do not merely label experiences already fully understood.
They provide increasingly sophisticated resources for construing them.
Meaning becomes richer because the system of distinctions becomes richer.
Language therefore enlarges thought, not by inserting ideas into the mind, but by increasing the range of meaningful possibilities available for organising experience.
Semantic significance is therefore deeply generative.
Meaning Beyond Immediate Experience
One of language's greatest achievements is that it liberates meaning from immediate presence.
Human beings routinely discuss events never witnessed.
We reason about galaxies beyond direct observation.
We reconstruct ancient civilisations.
We imagine futures that have not yet arrived.
We debate fictional worlds that have never existed.
None of this requires immediate experience.
Semantic significance allows meanings to travel.
The symbolic organisation survives independently of the original circumstances from which it emerged.
Indeed, much of civilisation depends upon this remarkable capacity.
Knowledge accumulates because meanings become transportable.
Ideas outlive individuals.
Cultures preserve understandings across generations.
Language becomes humanity's great architecture of inherited meaning.
Semantic Significance Is Real
At this point an important clarification becomes necessary.
To distinguish semantic significance from existential significance is not to diminish it.
Semantic significance is not a pale imitation of lived experience.
It is a genuine form of organisation.
Scientific theories possess semantic significance.
Legal systems possess semantic significance.
Mathematics possesses semantic significance.
Literature possesses semantic significance.
Indeed, entire civilisations are organised through systems of semantic significance.
These symbolic structures shape institutions, traditions, identities and cultures.
Meaning changes history.
It influences action.
It transforms societies.
Semantic significance therefore possesses extraordinary causal power.
It is neither imaginary nor secondary.
It is one of humanity's greatest achievements.
Halliday's Quiet Revolution
Perhaps Halliday's deepest contribution lies here.
Language is often treated as a tool for expressing thought.
Halliday invited us to reverse the relationship.
Language does not merely express thought.
It participates in creating the forms of thought available to us.
Every act of meaning-making simultaneously contributes to larger systems of meaning.
Language is therefore not simply an instrument of communication.
It is one of the principal environments within which human consciousness develops.
This insight helps explain why semantic significance deserves recognition in its own right.
It is not merely attached to experience.
It reorganises experience.
The Strange Position of Artificial Intelligence
This brings us unexpectedly close to our original motivation.
Large language models inherit vast systems of semantic significance.
They participate in relationships among meanings with extraordinary sophistication.
They navigate conceptual architectures constructed through centuries of human discourse.
In one important sense, their environment is semantic significance itself.
This observation should not be dismissed simply because language models lack biological experience.
Nor should it be mistaken for evidence that semantic significance alone constitutes consciousness.
Rather, it identifies something genuinely remarkable.
For perhaps the first time, we encounter systems that inhabit semantic significance almost directly.
Whether semantic significance alone can ever give rise to existential significance remains entirely open.
But we cannot even formulate that question properly until we first appreciate the remarkable complexity of semantic significance itself.
Looking Ahead
Halliday has helped us understand how language organises experience into systems of meaning.
Semantic significance emerges through relationships, distinctions and organised possibilities.
Yet throughout this discussion another question has remained quietly in the background.
Why do these meanings matter in the first place?
Language may organise significance.
It does not explain its origin.
For that, we return to Gerald Edelman.
The next essay explores existential significance: the world that matters before language begins.
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