Module 5 · Making decisions · Lesson 5 of 10

Evidence, intuition and your gut

When intuition is expertise and when it is only a feeling — and how to decide under uncertainty.

8 min read · Free — no account needed to read

The idea

Intuition is the fast, wordless sense that something is right or wrong. Evidence is what you can point to: facts, numbers, other people’s experience. Both have a place, and neither is always better.

Research on expert judgement suggests intuition can be trusted in particular conditions: when you have a lot of experience in an area where the same kinds of situations repeat and feedback comes quickly and clearly. An experienced nurse, firefighter or chess player develops intuitions worth listening to. In unfamiliar, rare or slow-feedback situations — choosing a career, buying a first home — a strong gut feeling is often just a feeling.

Decisions under uncertainty benefit from both. Gather the evidence that is available, notice what your intuition says, and pay attention when they disagree. A gut feeling that something is off is often a prompt to look for evidence you missed.

Why it matters

Trusting intuition in the wrong places leads to confident mistakes; ignoring it everywhere wastes real experience. Knowing when intuition is expertise and when it is noise improves decisions in both directions.

See it happen

Julia is buying her first car. One car feels instantly right; she likes the colour and the feel of the seat.

The first read

It just feels right, and she has always trusted her instincts, so she is ready to buy it on the spot.

With this idea

She notes she has never bought a car and gets no quick feedback on car choices, so her gut is not expertise here. She checks the service history and asks a mechanic friend. The car has a known gearbox problem. She buys a similar one without it.

What changed

She recognised her intuition was not experience-based here and checked the evidence.

Easy to get wrong

• Believing intuition is always wisdom. It is only as good as the experience and feedback behind it.
• Dismissing all gut feelings. In areas where you have real experience, they often carry information worth checking.

What this rests on

Well studied. Researchers have studied this a good deal. The core idea holds up, though details vary between people and settings.

• Daniel Kahneman & Gary Klein — Conditions for intuitive expertise (2009) — Two researchers from opposing camps agreeing that intuition can be trusted in regular environments with quick, clear feedback — and not elsewhere.
• Gary Klein — Sources of Power (1998) and the project premortem (2007) — Research on how experienced people decide under pressure by recognising patterns; and the premortem — imagining a plan has failed and asking why.
• Daniel Kahneman — Thinking, Fast and Slow (2011) — A tour of decades of research on fast, intuitive judgement and slower, deliberate reasoning, and the predictable errors each can make. A few studies the book describes (notably on priming) have not replicated well; Kahneman himself later said so.

Try it: Is my gut trained here?

1. Think of a decision where you have a strong gut feeling.
2. Ask: have I faced situations like this many times, and did I find out quickly how they turned out?
3. If not, write two pieces of evidence you could gather before deciding.

Reflect

• In which area of your life has your intuition been reliably right — and why there?
• When did a strong gut feeling lead you astray?

Use it in the coming days

Next time you have a strong gut feeling about a decision this week, write it down, then check one piece of evidence before acting.

Where to do it: My Journal

Recording gut feelings and later outcomes shows you where your intuition is trustworthy.