Dr. Wallace's Favorite Mental Models

The Collingridge Dilemma

Learn it → Apply it → Save as Skill

A new technology is easiest to redirect before anyone understands it well enough to want to. While a system, platform, or policy is still new, changing course is cheap — but almost nobody yet knows what its real consequences will be. By the time those consequences are clear, the thing is woven into infrastructure, habits, and other people's plans, and changing course has become slow, expensive, or nearly impossible.

Why This Library Is Different

Learn it. Apply it. Save as Skill.

The Dr. Wallace's Favorite Mental Models is designed to turn useful ways of thinking into reusable tools. Each model gives you a fast visual overview, deeper interactive learning, practical application exercises and an AI-ready Markdown skill you can save for future use.

Instead of merely reading about mental models, you can gradually build your own AI skills library: a collection of portable reasoning skills that can help ChatGPT, Claude, Grok and other AI assistants apply the mental models you value.

30-Second Understanding
Act before you know, or know too late to act?

Before a technology, feature, or policy scales, ask whether you actually understand its downstream effects — and if not, whether waiting until you do means losing the only moment when changing course was still cheap.

Core question: Is it already too expensive to change the thing we still don't fully understand?

The two-sided bind

Ability to change course
What we understand

Important: this is a snapshot of the early stage, when control is high and understanding is low. Wait long enough to gather real understanding, and the two bars trade places — control shrinks to match what knowledge grew into.

Mental Model Compass

Use it before a new system is easy to understand but hard to change.

Most useful at the exact moment you're deciding how fast to commit to a new technology, platform, architecture, or policy — while it's still unclear what its real consequences will be.

Decide & DesignPrimary use case
IntermediateDifficulty
3 minUnderstand
15–40 minApply with a real case
Product strategySoftware architectureAI governanceTechnology policyRegulatory designUrban planning
Model at a Glance

Map → Shrink → Instrument → Preserve.

The dilemma names a structural bind. These four moves turn it into something you can actually act on — close to what Collingridge himself called "intelligent trial and error."

01Map

Sketch the decision's reversibility curve: how fast will the cost of changing course rise as adoption, dependency, or infrastructure builds up around it?

02Shrink

Make the first real version small, cheap, and easy to unwind — not the most complete or permanent version you're capable of building.

03Instrument

Build in fast feedback: pilots, metrics, sunset clauses, scheduled reviews — so real consequences surface before the exit door closes.

04Preserve

Protect the ability to change course for as long as reasonably possible: modular design, staged rollouts, opt-outs — even at some short-term cost to speed.

When Should I Use This?

Recognize the situation.

Open a use case to see what the model changes about how you'd approach it.

Software / Product
A core architecture choice made in month one

Early on, swapping a database or integration pattern costs a sprint. Two years and millions of records later, the same swap costs a quarter and a dedicated team — right when you finally understand its real limits. Decide what you can afford to learn the hard way, and what you can't.

AI product decisions
Shipping a capability before its misuse patterns are known

A new AI feature ships fast because waiting for complete certainty about misuse means never shipping. The Collingridge move isn't "wait" or "ship and hope" — it's shrinking the blast radius (limited rollout, usage monitoring, a kill switch) so you can actually learn before the feature is load-bearing for other products.

Regulation / Policy
Writing rules for a technology still in its infancy

Regulate too early with incomplete evidence and you risk freezing a beneficial technology in its worst-understood form. Regulate too late and the technology's business models, user habits, and lobbying power are already built around the harm. Favor rules that stay adjustable as evidence improves over rules that assume today's understanding is final.

Urban planning
Choosing what a city is built around

A decision to widen roads instead of funding transit is cheap to reverse in year one and nearly impossible to reverse once zoning, commutes, and storefronts have organized themselves around cars for forty years. The dilemma is why so many infrastructure debates feel like arguing with the past.

Vendor / platform selection
Picking what your business runs on

Switching platforms in month three is an afternoon's migration. Switching after three years of integrations, trained staff, and dependent workflows is a multi-quarter project with real failure risk. Price the switching cost into the decision before you have any data on whether you'll need to switch.

Personal / career
Committing early to a specialization

Early in a career, changing direction costs a semester. A decade in, the same change costs income, identity, and a running start others already have. You rarely feel ready to decide at the one moment deciding is cheap — that mismatch is the dilemma, not a personal failure.

Worked Example

The two curves that cross and lock you in.

This is an illustrative example designed to teach the method, not a claim about any real company.

SITUATIONA startup picks a core data architecture in its first quarter to ship fast and win early customers.
MAPThe cost of replacing that architecture roughly doubles at each growth stage, while real understanding of its limits — query patterns, scaling cliffs, team dependency — grows more slowly at first.
CROSSING POINTAround the "Scale" stage, the team finally understands the architecture's real weaknesses — just as the cost of replacing it has already multiplied several times over.
RULE OUTSome rising cost is simply what growth does to any system — the dilemma isn't proof of bad planning, just a structural feature of building on knowledge you don't have yet.
REDESIGNApply "intelligent trial and error": keep the early architecture modular and run a small, cheap migration test before the dependency grows tenfold, not after.
NEXTSchedule the next major platform decision's "cost-to-change checkpoint" before the dependency curve steepens, not after it already has.
Do not conclude: "every early decision should wait for certainty." Waiting usually just guarantees you decide during the expensive, locked-in phase instead. The goal is faster learning, not slower commitment.
History & Accuracy

A 1980 diagnosis, not a modern buzzword.

Expand for the origin of the term, what its author actually proposed, and how the idea has aged.

Who was David Collingridge, and when did he introduce this?

David Collingridge was a technology-policy scholar associated with the University of Aston's Technology Policy Unit. He introduced the dilemma in his 1980 book The Social Control of Technology, writing about the structural difficulty of steering new technologies toward good outcomes.

What exactly are the "two problems" he described?

The information problem: a technology's full effects usually can't be known until it has been extensively developed and widely used. The power (or control) problem: by the time those effects are known, the technology is often so entrenched — economically, socially, institutionally — that controlling or changing it has become slow, costly, and difficult. Collingridge summarized the bind directly: "When change is easy, the need for it cannot be foreseen; when the need for change is apparent, change has become expensive, difficult, and time-consuming."

Did Collingridge actually recommend freezing new technology until it's proven safe?

No — that's the Precautionary Principle, a stricter, separate idea that later critics such as Wired editor Kevin Kelly and philosopher Max More argued is so risk-averse it can block beneficial innovation indefinitely without actually resolving the underlying uncertainty. Collingridge's own proposed answer was different: "intelligent trial and error" — favor small, flexible, reversible, low-cost experiments and fast feedback loops over big, irreversible commitments made on incomplete information.

Has the idea been critiqued or refined since 1980?

Yes. Scholars Audley Genus and Andy Stirling (2018) observed that while the "dilemma of control" is cited constantly in innovation research, much of that work engages only with the headline idea and skips Collingridge's fuller methodological and philosophical argument. They connected his original thinking to the modern "responsible innovation" and anticipatory-governance literature, arguing it deserves deeper engagement rather than replacement.

Common Mistakes

A sharp idea is easy to misuse.

Waiting for certainty that never arrives

Treating the dilemma as a reason to delay every decision until the consequences are fully known guarantees you'll decide later, during the expensive, locked-in phase — the opposite of the point.

Betting big early just to "move fast"

Ignoring the dilemma entirely and committing to the most permanent, least reversible version of a new system because speed feels like an advantage in itself.

Using it as an excuse to never regulate or decide

"We can't know yet" is a real asymmetry, not a permanent license to avoid responsibility. At some point a decision — even a provisional one — has to be made.

Reaching for the Precautionary Principle by default

Collingridge's own answer was flexible trial and error, not a blanket freeze. Conflating the two skips the part of his argument that is actually actionable.

Treating all technologies as equally locked-in

Some decisions stay cheap to reverse for a long time (a pricing experiment); others lock in almost immediately (physical infrastructure). Apply the model to the specific reversibility curve, not technology in general.

Assuming it's only a government or regulator's problem

The same bind shows up inside a single product team's architecture choice or a single person's career decision — scale the scrutiny to the stakes, not the size of the institution.

When Not to Use It

Some situations call for a different lens.

Use ordinary iteration when...

the cost of reversing the decision stays low no matter how long you wait — most feature flags, pricing tests, and copy changes never truly lock you in.

Use existing evidence when...

the consequences are already well documented elsewhere. If the information problem is already solved by someone else's experience, this isn't the right lens anymore — just use the evidence.

Use simple risk assessment when...

the stakes are genuinely low. Invoking a dilemma about irreversible technology lock-in for a trivial, cheaply-reversible choice is overkill.

Counterpoint: be wary of using "we can't know yet" as a permanent excuse to avoid ever deciding. The dilemma describes a real asymmetry between early and late action — not a license for indefinite delay.
Combine It With

One model rarely tells the whole story.

Try It Yourself

Build a Collingridge Dilemma analysis prompt.

This browser tool structures your thinking. It does not send your information anywhere or perform AI analysis.

Your AI-ready prompt

Complete the fields, then build your prompt.
Save as Skill

Turn this mental model into a reusable AI skill.

Save as Skill converts the model into portable Markdown instructions that teach an AI when and how to apply the Collingridge Dilemma, what questions to ask, what evidence to seek, what mistakes to avoid, and how to structure its analysis.

Build your own Mental Models Skills Library

Save the skills you find useful and organize them into your own reusable library. The Markdown is intentionally model-neutral, so it can be used wherever an AI system accepts uploaded files, project knowledge, custom instructions, or reusable text context. Platform capabilities differ, so this is a portable skill file rather than a claim of one-click installation.

Go Deeper

For readers who want the nuance.

Does the dilemma apply to individual decisions, or only large technologies?

Collingridge wrote about technology and society at large, but the same structural bind shows up at any scale where a decision gets harder to reverse as other decisions, habits, or infrastructure accumulate around it — a product's architecture, a city's roads, or a person's career path. Scale the analysis to the size of the stakes, not the size of the institution.

Isn't this just an argument for always moving slowly?

No — Collingridge's own preferred response, "intelligent trial and error," is about moving in small, reversible, well-instrumented steps rather than moving slowly in general. Speed and reversibility are different variables; the goal is to keep the second one high while moving at a reasonable pace on the first.

What would make a specific Collingridge Dilemma diagnosis wrong?

Finding that the decision's reversibility curve is actually flat — that changing course would cost about the same next year as it does today. If switching costs aren't rising meaningfully over time, the information problem still exists, but the power/control problem that makes it a true dilemma does not.