Scientist Mode
Treat opinions as hypotheses and decisions as experiments
- Difficulty
- Moderate
- Time to result
- ~ongoing to results
- Steps
- 5
- Confidence
- 99%
Scientist Mode replaces preaching, prosecuting, and politicking with testable thinking. Express an opinion as a hypothesis and a decision as an experiment, then specify what evidence would change your mind. Run a bounded test, inspect the result, and update without treating a failed prediction as a personal defeat. Grant strengthens the mechanism by distinguishing beliefs from values: beliefs describe what you think is true, while values describe what you think is important. Identity can stay anchored in curiosity, learning, or helping people even as a particular method is discarded. This makes changing your mind evidence of growth rather than a threat to self-worth and keeps principles stable while practices remain flexible.
Origin
Extracted from The Diary of a CEO
Core principles
- 01Do not let ideas become identity
- 02Treat every opinion as testable
- 03Focus on getting it right rather than being right
- 04Anchor identity in values, not current beliefs
How to run it
- 1
Separate value from belief
Name the enduring value you want to serve and the current belief about how to serve it. Keep them distinct.
Pro tip Use “I value…” and “I currently believe…” as separate sentences.
Watch out Do not disguise a preference as evidence.
- 2
Write the hypothesis
Turn the belief into a claim that could be supported or contradicted. Define the expected result.
- 3
Set a disconfirmation rule
Decide in advance what evidence would make you revise or abandon the belief. This limits motivated reasoning later.
Pro tip Ask a challenger to review the rule.
Watch out A hypothesis that cannot lose is an identity claim, not a test.
- 4
Run a bounded experiment
Choose the smallest ethical test that can produce useful evidence. Protect people from avoidable downside.
Pro tip Prefer reversible decisions while uncertainty is high.
Watch out Do not experiment where failure would cause unacceptable harm.
- 5
Update openly
Compare the result with the prediction and revise the belief, decision, or test. Explain what changed without abandoning the underlying value.
Pro tip Reward yourself for finding an error early.
Watch out Do not shift the criteria after seeing the outcome.
In the wild
A manager values effective collaboration and believes a particular interview exercise predicts it. Instead of defending the exercise as part of the company's identity, the manager compares scores with later team outcomes, defines what correlation would justify keeping it, and replaces it when the evidence is weak.
→ The hiring practice changes while the value of collaboration remains intact.
Common mistakes
Making the belief your identity
When self-worth depends on a claim being true, contrary evidence feels like a personal attack.
Testing without a losing condition
A decision is not a real experiment unless some result would trigger an update.
Confusing flexibility with no principles
Grant argues for stable values and principles alongside flexible practices and policies.
Is it for you?
Best for
It is best for uncertain choices where evidence can be gathered and beliefs are at risk of becoming personal identity.
Not ideal for
It is not ideal for settled ethical commitments or situations where experimentation would create unacceptable harm.
From the transcript
“every opinion you hold it's just a hypothesis you can test it”
From the episode
Adam Grant: The Surprising New Research On Procrastination, Perfectionism & Happiness!