8 · Compression and Decompression of Information

Chapter 8: Compression and Decompression of Information | StructLang

After the fake dog refund incident ended, I told different people about it.

To my mom:

“The dog was refunded.”

She: “Oh, good. We’re not really suitable for keeping a dog anyway—kids can get allergies.”

To a friend:

“I refunded that fake dog. The seller refused to budge, so I contacted the regulatory department and finally got my money back.”

He: “You were lucky. Usually these things don’t get refunded.”

To a colleague (detailed version):

“I discovered the seller lacked pet business qualifications, took this to the regulatory department, the official initially stonewalled, but he said ’this whole industry is like that,’ revealing a weakness. I then threatened to call the mayor’s hotline, the official immediately pressured the seller, and the seller refunded that same day.”

He: “Impressive, you really got to the key point.”

Same event, three tellings, three understandings.

What happened?

The Inevitable Loss from Experience to Narrative

Recall the complete event process:

The anger of discovering I’d been deceived
The frustration of being rejected by the seller the first time
The excitement of discovering the sign loophole
The nervousness when meeting the official
The anxiety when the official stonewalled
The surprise when he misspoke
The gambling mindset when threatening the mayor’s hotline
The relief when the seller compromised

And countless details:

The seller’s changing expressions
The official’s office layout
The weather, time, thoughts on the road
The exact wording of each conversation
The hesitation before each key decision

All this combined forms an extremely complex stream of experience.

But when I said “the dog was refunded,” all of this vanished.

What remained was just a single point: *refund dog

This process is compression.

Compression Is Inevitable

You might say: But you could tell all the details completely.

Really?

Try it.

Even if I used an entire chapter (Chapter 6) to narrate the entire event in detail, I could only tell:

Main time nodes (T0-T6)
Key dialogue content (general meaning, not word-for-word)
Core decision moments (why I did what I did)

But I cannot tell:

Every second of psychological activity
Every exchange of glances
All environmental details
Countless “possible but didn’t happen” branches

The reason is simple: cognitive capacity is limited.

Your brain cannot store all information. You can only store the compressed version.

Like taking a photograph:

The original scene has infinite information (light, temperature, sound, smell)
The photo only retains visual information
And even that is compressed (limited pixels, colors)

A photo is not a copy of reality, but a compression of reality.

Memory is the same.

Layers of Compression

Compression isn’t one-time, but progressive layers.

First Layer: Point Structure Is Compression

Returning to Chapter 1, we discussed point structure:

Intention: <refund>
Manifestation: *seller

What does this point “seller” compress?

This is a person (age, gender, appearance)
He has a shop (location, size, decor)
He has a history (how he opened the shop, what business he’s done)
He has a family (married? children?)
He has emotions (current mood, facial expression)

All this information, under the “refund” intention, is compressed into a single point: *seller

Point structure itself is the product of compression.

Second Layer: Line Structure Is the First Decompression

When I judged the seller:

Seller = Dishonest(-0.8)

This expands one dimension on the point structure.

But simultaneously, this is also a new compression:

All the seller’s actions
All the seller’s words
All the seller’s details

Were all compressed into a single value: -0.8

Third Layer: Surface Structure Is the Second Decompression

When I consider two dimensions simultaneously:

Seller[-0.8, +0.5](integrity × refund capability)

This expands another layer on the line structure.

But it’s still compression: only two dimensions, other dimensions are ignored.

Fourth Layer: Volume Structure Is the Third Decompression

Seller(-+-)

Three dimensions: Action, Quality, aTtitude.

Richer, but still compression: many dimensions aren’t included (like the seller’s financial situation, family pressure, industry experience).

So the entire structural system is a layer-by-layer decompression process:

Point → Line → Surface → Volume → Subject-Object

But each layer is still compressed.

You can never fully decompress to the original experience.

Decompression Is Subjective

Suppose I only told you: “The dog was refunded.”

How would you understand this sentence?

It depends on your intention and experience.

If You’re My Mom

She cares about family life, her intention is: <family members' safety and comfort>

When she hears “refunded the dog,” her decompression path:

*refund dog[family intention]
↓ Decompression
Refund dog = No longer keeping a pet(+0.6)[family safety]
↓ Further decompression
Conclusion: Good thing, avoids kid allergies

She doesn’t care at all how I refunded it or why it succeeded.

If You’re My Friend

He cares about social experience, his intention is: <understanding rights protection cases>

When he hears “contacted regulatory department and got refunded,” his decompression path:

*refund dog[rights protection intention]
↓ Decompression
Refund dog = Rights protection success(+0.7)[lucky]
↓ Further decompression
Conclusion: Pretty lucky, usually can't get refunded

He noticed the process, but decompressed it as “luck,” not “strategy.”

If You’re My Colleague

He cares about methodology, his intention is: <learning handling techniques>

When he hears “got to the key point,” his decompression path:

*refund dog[learning intention]
↓ Decompression
Refund dog = Strategy success(+0.9)[proper method]
↓ Further decompression
Conclusion: Got to the key point, worth learning

He understood the strategic level, but might not understand the structural level.

Same sentence, three completely different decompressions.

Why Different Decompressions?

Because decompression isn’t “restoring original information,” but reconstruction based on current intention and existing experience.

Intention determines decompression direction:

My mom’s intention is family life → decompress as “pet-keeping risks”
Friend’s intention is understanding cases → decompress as “difficulty of rights protection”
Colleague’s intention is learning methods → decompress as “strategy effectiveness”

Experience determines decompression content:

My mom has experience with pet allergies → decompress as “not keeping pets is safer”
Friend has experience of failed rights protection → decompress as “getting a refund is lucky”
Colleague has experience analyzing problems → decompress as “key points are important”

So decompression is not objective restoration, but subjective creation.

Multi-Agent Compression Chains

Now the situation becomes more complex.

Suppose my friend tells his friend about my experience:

“A friend of mine got a fake dog refunded, contacted the regulatory department, and succeeded in the end.”

His friend might respond: “Oh, regulatory departments are useful.”

Look what happened:

Original experience (me)
  ↓ Compression
"Contacted regulatory department and refunded dog" (me to friend)
  ↓ Friend's decompression (based on his intention and experience)
"Rights protection can contact regulatory" (friend's understanding)
  ↓ Friend's re-compression
"Friend refunded fake dog through regulatory" (friend to his friend)
  ↓ His friend's decompression
"Regulatory departments are useful" (his friend's conclusion)

This is a chain of compression-decompression-re-compression-re-decompression.

Each transmission involves:

Previous person compresses experience into narrative
Next person decompresses narrative into understanding
Understanding ≠ original experience
When compressing again, more information is lost

After passing through three hands, it may be completely unrecognizable.

History Is a Story from One Perspective

Now ask a question: What’s the “truth” of the fake dog refund incident?

From my perspective:

A complete structural game. I anchored the legal origin, found evidence, caught the other side’s mistakes, introduced external threats, guided the leap, and ultimately succeeded.

From the seller’s perspective:

An unexpected trouble. Could have dragged it out, but the customer was particularly persistent, the regulatory department suddenly got serious, had to give in.

From the official’s perspective:

A complaint that almost backfired. Fortunately handled in time, avoided accountability from superiors.

From my mom’s perspective:

Refunded a dog, that’s good.

Which is the “truth”?

All of them, and none of them.

Because:

There’s no uncompressed experience
- Even I myself can only remember the compressed version
- I cannot completely reproduce every second of psychological activity
Each perspective is real
- I indeed experienced the game process
- The seller indeed felt it was unexpected
- The official indeed felt it was trouble
- My mom indeed only cared about the result
Each perspective is partial
- I don’t know the seller’s true inner thoughts
- The seller doesn’t know my complete strategy
- The official doesn’t know if I would really call
- My mom doesn’t know any details

So “historical truth” is essentially a false proposition.

History is merely the compression-decompression product from a certain perspective.

Narrative Control: Who Dominates Compression?

Since decompression is subjective, compression can also be manipulated.

I Can Choose How to Tell It

Same event, I can tell it like this:

Version 1 (emphasizing luck):

“I was lucky—the seller happened to lack qualifications, the official happened to misspeak, I happened to catch it.”

Version 2 (emphasizing strategy):

“I carefully observed and found the loophole, caught the moment he misspoke, introduced external threats, guided the other side to leap.”

Version 3 (emphasizing justice):

“I persisted in protecting my rights, exposed the seller’s illegal operation, pushed regulatory intervention, and ultimately got justice.”

Version 4 (emphasizing difficulty):

“I made several trips, they kept stonewalling, I almost gave up, fortunately I persisted.”

Which is true?

All are true. But different emphases guide listeners to different decompressions.

Version 1 → Listener decompresses as “luck”
Version 2 → Listener decompresses as “wisdom”
Version 3 → Listener decompresses as “justice”
Version 4 → Listener decompresses as “persistence”

This is narrative control: guiding others’ decompression direction through selective compression.

The Seller Can Also Tell His Version

If the seller tells this story:

“A customer was particularly difficult, came to the shop to make trouble every day, I didn’t want trouble so I refunded.”

His friend might decompress: “Sigh, customers are too hard to please these days.”

Same event, in the seller’s narrative, I transformed from “rights protector” to “difficult customer”.

The News Report Compression Trap

Suppose this event made the news.

News headline:

“Consumer Discovers Seller Lacks Qualifications, Regulatory Intervention Leads to Successful Refund”

News content:

“Citizen Mr. Han purchased a pet dog and discovered the seller lacked business qualifications, complained to the regulatory department, and successfully got a refund under regulatory intervention. The relevant official stated they will strengthen supervision of the pet market.”

Look what this report compressed away:

My strategy process (sign loophole, misspeak, mayor’s hotline threat)
The official’s stonewalling (he initially didn’t want to handle it)
The seller’s stubborn resistance (he initially refused to refund)
The multiple game process (time windows, leaps)

What does the news present?

A simplified linear narrative:

Discover problem → Complain → Regulatory intervention → Resolution

Is this narrative “true”? From the result, yes.

But it lost the complexity of the process.

Readers might decompress after reading: “Oh, complaining solves it.”

But actually, complaining doesn’t necessarily solve it. It solved because I had evidence, caught mistakes, introduced threats.

News compression creates a “simplified causal chain”.

The Relationship Between Compression and StructLang

Now we can look back at the entire structural system.

Point Structure = Simplest Compression

*Seller[refund intention]

Countless information compressed into a point.

Line Structure = One-Dimensional Decompression

Seller = Dishonest(-0.8)

Expanding one judgment dimension on the point.

Surface Structure = Two-Dimensional Decompression

Seller[-0.8, +0.5](integrity × capability)

Positioning on two dimensions simultaneously.

Volume Structure = Three-Dimensional Decompression

Seller(-+-)

Complete individual state model.

Subject-Object Structure = Six-Dimensional Decompression

Me(+++) vs Seller(-+-)

Complete relationship structure.

The entire StructLang is a systematic decompression toolkit.

It can’t give you “complete truth” (because that doesn’t exist), but it can give you a hierarchical decompression framework.

Why Understand Compression and Decompression?

Because:

1. You can understand the source of misunderstanding

Communication difficulties aren’t because the other side deliberately misinterprets, but because:

Your compressed information ≠ the other side’s decompressed understanding
Your intentions and experiences differ
Leading to different decompression directions

2. You can identify narrative manipulation

News, advertising, propaganda—all guide your decompression through selective compression.

Once you realize this, you can ask:

What did this narrative compress away?
From another perspective, what would the story be?
Am I accepting a compressed version, or thinking independently?

3. You can communicate better

Knowing the compression-decompression mechanism, you know:

Don’t assume the other side can “automatically understand” your meaning
Choose appropriate compression methods based on the other side’s intention and experience
Actively clarify, confirm whether the other side’s decompression matches your intention

4. You can understand “there’s no absolute truth”

Not nihilism, but understanding:

Truth is perspective-dependent
Each perspective has its reality
But each perspective is also partial

Next Chapter

Compression and decompression explain “why different people understand differently.”

But there’s another question: Why are some understandings particularly stubborn and hard to change?

Why do both the seller and official tend to use the “stonewalling” strategy? Why do they think this strategy works?

Why do I firmly believe the “legal origin” is useful? Why do I believe “deadlocks will always be broken”?

Where do these deep beliefs come from?

This is the next concept: Causal Impression.

7 · How Structures Leap 8 (Supplement) · Volume Structure and Decompression Diversity