# hindsight is twenty twenty (retrospection)

*Ordinarily means:* It's easy to understand something after it has already happened.

A self-model that was wrong during the event becomes accurate when the past is observed, revealing that the model could not see what was coming even though the pattern was already in motion.

- Computed level: L15 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: emergence  ·  Arena: emergenceLexicon

## Emergence
**Emerges from:** [self-model](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-self-model.reflexive), [model](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-model.representation), [past](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-past.temporal), [pattern](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-pattern.regularity), [error](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-error.mistake)

**Through:** emergent

**Novel properties:**
- emergent.window

## Examples
- The 2008 financial crisis was widely explained by economists using models that failed to predict it, despite available market data. *(economics)*
- After the Challenger disaster, NASA engineers identified O-ring failure as the cause, though pre-launch models had ignored the risk. *(engineering)*
- In 1914, European diplomats recalled alliance patterns only after war erupted, though treaties had long encoded the cascade. *(institutions)*

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-hindsight-is-twenty-twenty.retrospection*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-hindsight-is-twenty-twenty.retrospection.json*  
*Every definition provably resolves to space, time, energy and pattern.*