Point at any rule, routine or “must” and ask, with real curiosity: does it have to be this way?
Best for
Questioning fixed habitsrules, routines, “musts” and “can'ts”
Time
5–20 minutesa minute or two per challenge
People
Solo or teambest when anyone can question anything
Difficulty
Beginnerthe hard part is staying curious
Origin
Edward de Bonoone of his lateral thinking tools
01 What it is
Question the things nobody questions.
RMWBOI
Every problem comes wrapped in things nobody questions: rules, routines, must-haves and “we can't” statements that feel like facts. Challenge is the habit of pointing at one of them, on purpose, and asking: Why is it like this? Does it have to be? Could it be another way?
A challenge isn't a complaint or an attack. You aren't claiming the current way is wrong, only that it might not be the only way. Often the honest answer is “yes, it really does have to be like this”, and that's fine. But every so often a rule turns out to be an old habit, and a whole set of new options opens up.
Because each challenge takes a minute, you can use it anywhere: when you're first defining a problem, in a stuck meeting, or to test a plan before you commit to it.
Use it when a team keeps saying “we have to” or “we can't”, when you're defining a problem and want to know what's really fixed, or when every new idea looks like the last one.
Where it comes from. Edward de Bono described challenge as one of the deliberate tools of lateral thinking. He separated it sharply from criticism: the point isn't to prove the current way wrong, but to find out whether it's the only way.
Point at one part at a time. The left side is how it works today; the right side is the challenge.
R
Rules and policies
The “we have to” that someone once decided
Who made this rule, and does the reason behind it still hold?
What problem was this rule created to solve? Is that problem still here?
Is it a law, a written policy or simply a habit?
What would actually happen if we stopped following it?
Library finesFines were meant to get books back. Do they, or do they mainly keep some families away?
M
Must-haves
Parts everyone assumes you can't drop
Does it really need this, or have we just always had it?
What would it look like without this part?
Who would actually miss it, and how much?
Is this essential to the purpose, or only to the current method?
Library finesMust every borrower show a library card? Could a phone number or a school ID do the same job?
W
The way it's done
Methods, steps and routines
Why is it done this way, and is this the only way?
Why do the steps happen in this order?
How would a newcomer, or someone far away, do it?
Which step exists only because of an earlier step?
Library finesWhy must books go back to the branch they came from? Why not any branch, or a drop box at the grocery store?
B
Boundaries
Who, where and when it applies
Why does it stop here, and what lies on the other side of the line?
Why these people, and not others?
Why this place, this time, this size or this limit?
What's just across the line that nobody considers?
Library finesWhy do loans last three weeks for everyone? Could teachers or families with young kids get longer?
O
Either-or choices
Trade-offs we assume we must make
Do we really have to choose, or could we have both?
Which two things do we believe we must trade off?
What would getting both look like?
Is the trade-off real, or just a result of how we set things up?
Library finesGet the books back or stay welcoming? A fine-free amnesty week might do both.
I
The impossible
Things “everyone knows” can't be done
Why can't it be done, and what would have to be true for it to work?
Who decided it's impossible, and when?
Has anyone, anywhere, done something like it?
What would have to change to make it possible?
Library fines“We can't afford to lose the fine income.” How much is it, really, after the cost of collecting it?
02 Why it works
Why a simple “why?” is so powerful
Every working day runs on assumptions; we couldn't function without them. Challenge brings a few into the light so you can decide whether they still deserve your trust.
1
Assumptions are invisible
Most of what limits a solution is never written down. It's just “how things are”. Saying an assumption out loud is the first step to seeing it as a choice rather than a fact.
2
Rules outlive their reasons
Many rules were sensible answers to problems that have since gone away. The rule survives because nobody remembers why it started. Asking “what was this for?” often shows that the original reason no longer applies.
3
No attack, no defense
Because a challenge doesn't claim the current way is wrong, nobody has to defend it. The conversation stays curious instead of political, even when you're questioning something a colleague designed.
4
It opens new ground
Each assumption you drop removes a wall. Once “it has to happen at city hall” goes, a whole range of places, times and formats becomes possible, options that were invisible a minute earlier.
03 How to use it
Run a challenge session in five steps
Describe how it works now 5 min
Write the current situation plainly: what happens, where, when, who's involved and what rules apply. You can't challenge what you haven't described.
Find the targets 5 min
Read your description and underline every rule, must-have, method, boundary, either-or and “impossible”. Listen for words like always, never, have to and can't. Those are your targets.
Challenge one at a time 1–2 min each
Point at a single target and ask: Why is it like this? Does it have to be? What else could it be? Write down the honest answer, even when it's “yes, it really must”.
Follow the openings 10 min
Where a challenge cracks something open, stay there. List the alternatives that become possible once that assumption is gone. Don't judge them yet.
Check what's really fixed 5 min
For the most promising openings, find out what kind of rule you're dealing with: a law, a contract, a policy or a habit. Pick one or two to test, and note who you need to ask.
✓Do
Challenge things, never people
Ask “why?” with genuine curiosity
Record the honest “yes, it must” answers too
Check which rules are real and which are habits
✕Avoid
Using challenge to win an argument
Challenging everything at once
Accepting “we've always done it” as a reason
Dismissing a challenge because it sounds naive
What you need
A plain description of how things work now, a pen for underlining assumptions and 15–20 minutes. With AI, the prompt below plays the outside challenger for you.
04 Worked example
Challenge in action: a budget meeting nobody attends
The challenge
“About 30 people come to our budget consultation each year, and it's the same 30 every time.”
Subject: a city's annual budget consultation. Goal: hear from more renters, young families and newer residents. Constraint: one formal public hearing is legally required.
6 targets · 30 minutes
R
Rules
“Input happens at the public hearing.” The legal requirement turned out to be one hearing, not that the hearing is the only way to give input.
M
Must-haves
“Residents need the full budget to comment.” Most care about a few lines. A one-page “your street, your taxes” summary could replace the 200-page document.
W
The way it's done
“Staff present, then take questions.” Why that order? Residents could set priorities first with a simple budget game, then hear the trade-offs.
B
Boundaries
“It happens at city hall on a weekday evening.” Why there? Try pop-up tables at the farmers market, school pickup and the main bus stop.
O
Either-or
“Deep input from a few, or shallow input from many.” Why not both? A five-minute online poll for many, plus a workshop for those who want more.
I
The impossible
“Young families won't come, whatever we do.” Who decided? Free childcare and a simple dinner at the workshop had never been tried.
What they'll try next spring
Pop-up tables at three busy spots, a one-page summary, and a priorities game to open the workshop. The formal hearing stays, but it's no longer the only way in.
05 ✦ Go AI
Let AI ask the naive questions
Inside a team, it's hard to question the rules everyone lives by. AI has no history with your rules and no reason to protect them, so it makes a useful outside challenger. What it can't know is which rules are real legal or safety requirements and which are just habit. That check is your job.
YouYou bring
A plain description of how things work now
Which rules are law, contract, policy or habit
The history of why things became this way
Judgment on which openings are worth testing
⇄
AIAI brings
A long list of hidden assumptions to question
An outsider's view with no stake in the past
Examples of others who dropped a similar rule
Alternatives that open up once a rule falls
MOVE 01
Assumption sweep
Have AI flag every hidden must, can't and always in your description.
Here's how our budget consultation works. List every assumption in it, from obvious to buried.MOVE 02
Why ladder
Ask why, then why again, until you reach the real reason for a rule.
Ask me 'why?' about our hearing-only habit, up to five times, one question at a time.MOVE 03
Who dropped it?
Find others who challenged the same assumption, and check what happened.
Which cities have gathered budget input outside formal meetings? Say how sure you are of each.MOVE 04
Opening list
Once an assumption falls, map what becomes possible.
Suppose input doesn't have to happen at city hall. Give me 10 alternatives, from easy to bold.
Watch out for
AI can invent precedents. Check any city, law or case it names before you repeat it.
It doesn't know your rules. Check each “rule” against the actual law, policy or contract.
Some rules earn their place. Rules that protect safety, fairness or legal rights should stay.
Mind the tone. Share challenges as questions, not as a list of other people's mistakes.
06 Your prompt
Your Challenge partner, ready to paste
Describe how things work now, pick a mode, then copy the prompt into Claude, ChatGPT, Gemini or Copilot. In coach mode the AI helps you find hidden assumptions, then challenges them one at a time and waits for your answers.