Assessment Over Assumption
Keep opinions open and update them from live behavioral evidence
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 99%
Assessment Over Assumption separates what is observed now from conclusions imported from prior experience. An assumption jumps directly to an explanation; an assessment accumulates indicators in real time and keeps competing explanations open. Bustamante demonstrates the difference by observing the host's movement, speech, clothing, and discomfort with sitting while refusing to claim that he knows why she behaves that way. The assessment can still guide a low-risk action, such as suggesting a walk, without pretending the underlying cause is settled. The method rejects the cultural pressure to finish every opinion. Instead, a view can remain an open loop for days or years and be revised whenever new behavior appears.
Origin
Bustamante contrasts a host's generalization about smiling people with the CIA practice of forming ongoing assessments from indicators shown in real time.
Core principles
- 01Assumptions jump from history to conclusion
- 02Assessments are built from current indicators
- 03An assessment can remain unfinished
- 04New evidence should change the opinion
How to run it
- 1
Capture observations
Write only what was seen or heard without adding motive or diagnosis.
Pro tip Use language a camera or recorder could verify.
- 2
Generate explanations
List several plausible interpretations for the same indicators.
Watch out One familiar explanation is not the only explanation.
- 3
Mark confidence
State how strongly the evidence supports each interpretation and what remains unknown.
Pro tip Use 'may' and 'I don't know' accurately.
- 4
Take a reversible action
When action is needed, choose a low-risk response that works across several plausible explanations.
Watch out Do not make irreversible decisions from a thin assessment.
- 5
Keep the loop open
Collect new indicators and revise rather than defending the initial view.
Pro tip Schedule a review for consequential assessments.
In the wild
A manager observes that a normally vocal colleague gives short answers and leaves a meeting early. Instead of assuming disengagement, the manager keeps several explanations open: workload, disagreement, illness, or a personal issue. The manager checks in privately with a neutral question and updates the assessment from the response.
→ The manager responds to evidence without turning one behavior into a fixed character judgment.
Common mistakes
Smuggling motives into observations
Words such as lazy, defensive, or dishonest are interpretations, not directly observed indicators.
Forcing closure
The desire to have an opinion can produce certainty that the evidence does not support.
Is it for you?
Best for
It is best for reading behavior, managing relationships, and making decisions under incomplete information.
Not ideal for
It is not ideal when immediate safety requires a precautionary decision before enough evidence can be gathered.
From the transcript
“Assessment means that you are building an opinion in real time based off of indicators that you're being shown.”
“It's about recognizing that you don't have to conclude anything.”
From the episode
Episode 519: Andrew Bustamante: Reading People, Predicting Behavior and Creating Leverage
Andrew Bustamante