Module 7 · Living with uncertainty · Lesson 4 of 5

Acting as an experiment

Try something small, watch what happens, and update what you believe.

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The idea

When you cannot know how something will turn out, you can treat your next step as an experiment rather than a final commitment. An experiment has a question (“Will I enjoy teaching?”), a small action (“Volunteer to tutor for a month”), and something to observe (“How do I feel after each session?”).

Thinking this way lowers the stakes. An experiment cannot fail in the usual sense: if the result is not what you hoped, you have still learned something. It also makes change easier, because you are gathering evidence rather than betting your identity on one big leap.

The partner skill is updating your beliefs. When the evidence comes in, let it change your view, in proportion to how strong it is. People who forecast well tend to update often, in small steps, rather than holding firm and then flipping completely.

Why it matters

An experimental approach lets you explore paths that would feel too risky to commit to fully, and learn about yourself and the world at low cost. Updating on evidence stops you from clinging to views the facts no longer support.

See it happen

Bruno thinks he might want to become a nurse, but retraining would take three years and he is not sure he would like it.

The first read

It is a huge commitment, so he feels he should either commit fully or put the idea away for good.

With this idea

He designs an experiment: work as a volunteer on a hospital ward two evenings a week for three months, and write a few lines after each shift. By the end he has real evidence — he loves the patient contact and finds the pace hard but manageable — and applies with confidence.

What changed

He turned an all-or-nothing choice into an experiment and updated on what he found.

Easy to get wrong

• Running experiments without writing down what you expected. Without that, it is hard to learn from the result.
• Updating too much on one piece of evidence. One bad day is not the answer to whether you would like a career.

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.

• Philip Tetlock & Dan Gardner — Superforecasting (2015) — Research on people who forecast world events unusually well: they think in probabilities and update their views in small, frequent steps.
• Herminia Ibarra — Working Identity (2003) — A study of people changing careers, finding they usually tried out new possibilities in small ways before committing, rather than planning first.

Try it: Design a small experiment

1. Write a question about your life you would like answered.
2. Design a small, time-limited action that would give you evidence.
3. Write what you expect to find, and how you will record what actually happens.

Reflect

• What part of your life could be approached as an experiment instead of a final decision?
• When did evidence last genuinely change your mind about something?

Use it in the coming days

Start one small experiment this week with a clear question and an end date, and add it to your goals.

Where to do it: My Goals

An experiment with an end date fits well as a short goal with a check-in.