Su's Guide to Building Demons

In the heat death universe of information, humanity divides into two types: one is particles in Brownian motion, drifting with the current, eventually fading to mediocrity; the other is Maxwell's Demon, holding the switch, swimming upstream, building order.

This isn't metaphor. This is physics.

In the previous article E^F Law, we derived a value creation formula: V = E^F × S / N. We mentioned Maxwell's Demon thought experiment: a hypothetical tiny being that creates order by discerning molecular speeds.

That article answered "why." This article answers "how."

How do you become a Maxwell's Demon?

Being a demon doesn't require three heads and six arms. Just three things: establish constitution, build clones, collect tax.

Establish Constitution

Maxwell's Demon works because of one prerequisite: it can instantly identify molecular speed. Fast molecule comes, open door. Slow molecule comes, close door. Clear criteria, decisive execution.

But most people fail in information streams precisely because their "value standards" are vague.

They say "I want valuable information" but never define what "valuable" means. They say "I want to filter noise" but never specify what "noise" is.

So every piece of information that arrives requires ad-hoc judgment. This process itself consumes energy. Worse, inconsistent standards mean what feels important today feels boring tomorrow. The entire system stays in chaos.

The first step to being a demon isn't writing code. It's ruthless decluttering. You must first build a "value constitution" in your mind.

Negative List First

Most people try to define "what is valuable." This is hard because value is contextual.

A more effective method is to first define "what is absolutely valueless." This is the negative list.

The negative list's feature: once triggered, unconditional rejection, no further judgment needed.

Emotional clickbait? Close door. Opinions without data support? Close door. Same news repackaged from different sources? Close door. Pure entertainment gossip? Close door. "Hot topics" older than three days? Close door—they're no longer hot.

The negative list's power: it front-loads and automates massive judgment work. When information arrives, run through negative list first. If hit, close door immediately, no cognitive resources needed to evaluate positive value.

Like security screening. Not checking if everyone is good, but checking if anyone carries contraband. Contraband found, no entry. No contraband, discuss the rest.

Positive List Must Be Specific

Negative list defines "threshold." Positive list defines "target."

But positive list can't be vague "valuable"—must be specific, executable criteria.

If you focus on tech investment, "tech news" is too vague. "Official announcements from specific companies" is specific. "Major fluctuation" is too vague. "Change > X%" is quantifiable.

Source must be clear. Thresholds must be specific. Standards must be codeable, or at least judgeable in 3 seconds.

That's the meaning of "constitution." Turn your implicit judgment standards into explicit, stable, executable rules.

The Judgment Function

If we formalize constitution-building, you're essentially defining a judgment function:

f(information) → { pass, reject, pending }

Good judgment functions are low latency—fast judgment, ideally instant. Low false negatives—won't wrongly reject truly valuable information. High recall—won't miss important information. Iterable—can adjust parameters based on feedback.

Most people's judgment function is a mess. Thinking from scratch each time, no reuse, no accumulation.

A demon's judgment function is clear, stable, executable.

Build Clones

Constitution defines "open or close door" criteria. But who executes these criteria?

If you execute yourself, you're not the demon—you're the door panel.

You'll be battered to death by information flow. Daily scrolling Twitter, refreshing news, scanning chat groups, trying to filter with naked eyes. This process itself consumes your E, lowers your F, increases your N. Every term in the formula worsens.

The demon's essence: it doesn't consume energy itself, but creates order.

How? Build clones.

Clone Levels

Simplest clones are rule-based filters. RSS subscription plus keyword filtering, email filter rules, chat group keyword blocking. Rules are hardcoded, judgment is binary: hit or miss. Suitable for highly structured, clear-rule scenarios.

More advanced is crawlers and scripts. When data sources don't provide standard APIs, you need to actively crawl and parse. Monitor price changes on specific websites, crawl competitor update logs, scan for abnormal patterns in on-chain transactions. Requires programming ability, but logic is still deterministic. You define rules, it executes.

Most advanced is AI Agent. When judgment criteria can't be expressed in hard rules, bring in machine learning or large language models. Use LLM to judge if an article is "deep," use classification model to identify emotional content, use Agent for multi-step information verification. Judgment criteria are soft, probabilistic, can handle fuzzy scenarios but may make mistakes, needs human supervision and feedback loops.

In practice, three layers are usually mixed. First layer does coarse filtering, filtering obvious noise. Second layer does crawling, getting non-standard data. Third layer does fine filtering, handling fuzzy judgment.

A Concrete Example

Suppose you're doing crypto investment, caring about "arbitrage opportunities."

Ordinary approach is flesh as demon. Daily check 10 exchange prices, stare at 20 Telegram groups, follow 50 KOL Twitter accounts. Exhausted, still miss opportunities.

Clone-building approach is different.

First establish constitution. What's a hot particle? Same asset's spread between two exchanges exceeds 2%. What's a cold particle? Spread below 0.5%, or insufficient liquidity.

Then build clone. Write a crawler, running 24 hours, monitoring multi-exchange prices. When spread exceeds threshold and liquidity is sufficient, trigger alert to phone.

Result? No screen-watching needed. Phone only rings when real opportunities appear. Energy spent on decision and execution, not filtering.

This is the meaning of S in the E^F formula. Each clone is systematization accumulation. They can be reused, iterated, extended.

Human-Machine Hybrid

The perfect demon isn't pure machine or pure human, but human-machine hybrid.

Information stream comes in, machine first does coarse filtering, filtering 99% obvious noise. Then machine does fine filtering, filtering another 90% fuzzy content. What's left goes to human decision.

Machine advantages: tireless, parallelizable, quantifiable. Human advantages: handle ambiguity, cross-domain association, ultimate judgment.

Good system design lets machines do what machines do well, lets humans do what humans do well.

Collect Tax

You have constitution. You have clones. Now you're a qualified demon.

You can create order from chaos, filter signal from noise.

But order itself isn't the goal. Order is energy. Energy can do work. Work can monetize.

This is taxation.

Internal Loop

Maxwell's Demon creates "temperature difference." In physics, temperature difference drives heat engines to do work.

In information world, "temperature difference" means information asymmetry. You know what others don't—you have arbitrage space.

Internal loop play: use demon to filter high-value information, make decisions based on this information, obtain excess returns.

This model's feature: returns go entirely to yourself, but scale is limited by own capital and energy.

External Loop

Today's internet is a swamp. Information overload drowns everyone.

If you can filter swamp water into clean water, you can sell clean water.

External loop play: use demon to filter high-value information, package this information into products, sell to those without time or ability to demon themselves.

Newsletter is one form. Daily help users filter the most important items, charge subscription fee.

SaaS tool is another form. Watch specific data changes for users, block noise for users, charge monthly fee.

Consulting is a higher-end form. Help clients make domain-specific information decisions, charge project fee.

Paid community is yet another form. Gather high-quality information sources, members themselves are demons, mutually filtering information for each other, charge membership fee.

All these business forms are essentially "Maxwell's Demon service providers." Users don't pay for information. Information is everywhere, tons of it free. Users pay for: you helped me close that door full of noise.

This model's feature: scalable, low marginal cost. One filtered information package can sell to 1000 people.

Demon Network Effects

When you have one demon, next step is natural: can you have more?

Single demon's ability is limited. It can only filter on one dimension. But when multiple demons form a network, new effects emerge.

One is vertical stacking. Raw information stream first goes through Demon A filtering source, keeping only trusted sources. Then through Demon B filtering content, keeping only on-topic. Then through Demon C filtering quality, keeping only high-quality. Each layer demon reduces entropy. Final output's SNR far exceeds what any single demon could achieve.

One is horizontal collaboration. Demon A monitors price, Demon B monitors sentiment, Demon C monitors on-chain data. Different dimension demons cover different information sources. Single dimension may be insufficient for judgment, but multi-dimensional signals converging produce more reliable insights.

The most powerful demon network is actually the human social network. If your friends are all high-quality information filters, information from them is naturally low-entropy.

This is why "circles" matter so much. A good circle is itself a massive distributed demon network. Each member is a demon, mutually filtering information for each other.

Paid communities' essence is this. You're not paying for information, you're paying to enter a low-entropy information environment.

Your First Demon

Theory done. Now it's practice time.

What should your first demon be?

Answer depends on your current pain point. Ask yourself: what do I waste the most energy filtering noise on every day?

Maybe scrolling Twitter for valuable content—make a keyword filter plus AI quality judgment. Maybe monitoring price changes of some product—make a price monitoring script. Maybe tracking competitor dynamics—make a competitor update crawler. Maybe filtering important info from emails—make an intelligent classifier.

Start from the most painful point. Build a small demon. Get it running.

No need for perfection at start. Having one working demon beats having a perfect design.

Then iterate. Observe its performance. Adjust rules. Add features. Make it smarter.

When you have your first demon, the second will naturally appear. Then third. Eventually you'll own a demon swarm.

Then you're no longer an ordinary person drowning in information, but a gatekeeper standing above the information flow.

My First Demon

Theory covered. Let me share my own story.

I'm an indie developer. Over the past few years, I've built many tools. Most of them nobody used.

What went wrong? Not technical skills—it was finding the right problem. I was building in a vacuum, making things I thought were cool, instead of what the market actually needed.

Later I tried various methods to discover user needs. Scrolling Twitter to see what people complained about, browsing Reddit for recommendation requests, lurking in communities to hear frustrations. Very inefficient. Hours spent each day, little to show for it.

Classic "flesh as demon."

Worse still, ever since Musk took over Twitter, I noticed my For You feed barely shows English content anymore. The algorithm locked me in a filter bubble. Unless I actively search—but active searching is inefficient, and I never developed that habit. Seeing what tools foreigners use, what pain points they complain about, became increasingly difficult.

One day it hit me: what I was doing was an information filtering task. I was searching through massive social media content, trying to find "someone's complaining, but there's no good solution yet" pain points.

This could be automated.

So I started building my demon.

Establish constitution. What's a "hot particle"? I defined criteria: must be someone expressing a specific pain point, must be software/tool related, must be something existing solutions do poorly or don't exist. What's a "cold particle"? Pure venting without clear need, problems with mature solutions already, scenarios too niche to have commercial value.

Build clone. I wrote a Chrome extension running on my Mac Mini, monitoring X (formerly Twitter) data stream 24/7. It intercepts all tweets, sends to backend. Backend uses AI for cleaning and classification: is this expressing a pain point? What domain? Are there existing solutions? Only "hot particles" that pass through layers of filtering get saved.

Collect tax. The filtered information became a product. I turned it into a website: SaaS Gaps. Every Friday, subscribers receive 5 curated Micro-SaaS startup ideas, each with original pain point source and my MVP suggestions. Paid users access the complete historical database, search by keyword, filter by industry.

That's a complete demon-building workflow. From "I waste hours daily scrolling Twitter for needs" pain point, to "a 24/7 automated system filtering information for me, also generating revenue" outcome.

Now I don't need to spend hours in social media anymore. The demon guards that door for me. Only truly valuable pain points get through, entering my field of view.

This demon saves me roughly 10-15 hours per week of information filtering time. And it's generating income.

That's the magic of building demons.

If you're also a developer or entrepreneur trapped in a filter bubble, not knowing what overseas users are complaining about or needing, SaaS Gaps has tons of real user pain point complaints. These are first-hand demands mined from English Twitter—not second-hand retellings, not media packaging. Maybe your next product idea is hiding in some tweet.

From E^F Law perspective, establishing constitution raises F—clearer criteria, more focused execution. Building clones raises S—each demon is a reusable system. Collecting tax raises V—order becomes value.

Meanwhile, all three steps lower N. Noise gets blocked outside by demons, no longer consuming your energy.

This isn't motivational platitude. It's an engineering solution.

Demons can be designed, built, iterated.

Go build your first demon.