The Knowledge Pie

You make decisions out of a very small slice of what there is to know, and the size of that slice has almost nothing to do with how confident you feel while you decide.

The knowledge pie sorts everything into four parts: what you know, what you know you do not know, what you do not know you do not know, and the awkward fourth slice — the things you are certain of that are no longer true. Businesses are rarely damaged by the first two. The known-and-unknown framing was made famous by Donald Rumsfeld in 2002, though the underlying idea sits in decision-making long before that; the version worth using in a business adds that fourth slice, because in an owner-managed business it does more damage than the others.

The four slices

What you know

Your costs, your capacity, your lead times, the things you can go and check. This slice is real, and in a long-established business it is large and reliable. It is also the slice that produces the confidence that leaks into the others.

What you know you do not know

Your honest list of gaps. This is a healthy list, because a question you have named can be answered by lunchtime. It feels like the risk register, which is exactly why it gets mistaken for the whole of your ignorance.

What you do not know you do not know

Everything you have not thought to ask about. You cannot make this slice smaller by thinking harder, because thinking harder only works on questions you already have. It shrinks through contact: with people who have done the thing, with customers who tell you the truth, with a market you have actually operated in.

What you are sure of that is not true

The expensive one. It is what you learned when it was true and never revisited. It feels identical to knowledge, because it was knowledge — several years ago.

Why does it matter to an owner?

Because nothing in your week challenges that fourth slice. Nobody who works for you is going to sit you down and explain that your view of your own market is out of date. Your team will assume you know something they do not. Your customers will not tell you unless you ask, and the ones who disagreed most strongly have already left.

Experience makes it worse before it makes it better. Twenty years in a trade builds a huge, reliable first slice, and it also builds confidence that spills over into questions you have not looked at for years. The most dangerous sentence in an owner-managed business is “I know this market”, said by somebody who has not lost a pitch in three years because they stopped bidding.

The commercial cost lands in a specific place: anything new. A new sector, a new product, a larger size of client, an acquisition. Inside your existing business the unseen slice is small, because decades of contact have burned through it. Step sideways and it is suddenly enormous, while your confidence stays exactly where it was. That is where the surprises live — accreditations you do not hold and cannot get quickly, insurance levels you do not carry, payment terms and retentions that change the working capital arithmetic, and bids that take days of your own time rather than an hour. None of it is unknowable. All of it is already known by the people doing that work.

How to use it this week

Write your five core beliefs about your market, and date each one

Why customers buy from you, where you sit on price, who your real competitors are. Put the year you last actually tested it. Anything older than two years belongs in the fourth slice until proven otherwise.

Ring three customers and ask one question

“What nearly stopped you buying from us?” You are not selling, you are auditing. Do not defend the answers. Write them down.

Buy an hour from somebody who has already done it

Before any new market, product or acquisition, find somebody two years ahead of you and pay for their time. It is the fastest conversion of the unseen slice into a list of things to sort out that exists.

Run a pre-mortem on your biggest current bet

The technique is Gary Klein’s. Assume it is twelve months on and it has failed, then write down why. The failures your team can imagine are almost never the ones you have planned for.

Ask what would have to be true

Take your key assumption and finish the sentence: “for this to work, it would have to be true that…” Then check the one item on that list you have never verified.

Count your questions in the next management meeting

If you made twenty statements and asked two questions, you are managing entirely out of the first slice, and everybody in the room noticed before you did.

The mistakes to avoid

The first is treating your list of known gaps as the whole of your ignorance. It feels like the risk register, and it is not. It is the comfortable part, because every item on it is already a task.

The second is confusing years in the trade with current knowledge, and then hiring people who confirm it. A team assembled from your own way of thinking cannot see the unseen slice either, and a team who learned everything from you cannot see the out-of-date one at all. That is not a comment on their ability. They are standing in exactly the same place you are.

Questions to ask yourself

• Out of 10, how confident are you about your market, and when did you last check any of it with somebody outside the business?
• What do you believe about your customers that you have not tested in the last three years?
• Who could tell you the uncomfortable truth about your business, and when did you last give them the chance?
• On your biggest current decision, what would you need to find out to be genuinely informed rather than just decisive?

Where this fits in coaching

This is much of what an outside coach is actually for. It is worked through in Personal Coaching, and it sits alongside two related mindsets: The Happiness Pie and Identity and Beliefs.