o understand *one piece* of how the box works (the true DGP).
   - When you *change* one factor, how does it change the result?
   - Helps us make decisions about what to do (in policy, business, personal life).

3. .hi-purple[**Predictive:**] Create your own box to try to match the output.
   - Doesn't matter if it works the same, or if you have the correct inputs.
   - Only matters how closely your box produces the same result.
   - Helps us know what's likely to happen in a new situation.

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