# Ch. 21 — "What is this?" Mystery Exercise

Two fictional "what is this?" items for the everyday-curiosity exercise:

- `mystery-form-fragment.txt` — a fragment of dense tax-form language (a made-up "Section 4(b)(ii)" on ESPP apportionment) of the kind nobody can parse on a first read.
- `mystery-error-log.txt` — a cryptic error log from a fictional smart thermostat. The pattern is in the log if you read it carefully.

## Exercise

> Pick one of the mystery items. Hand it to the agent with one line of context that matches your real life — for example, *"my smart thermostat is doing this, what's wrong?"* or *"my HR sent me this and asked me to fill it in, what is it asking me to do?"*

**You'll know it worked when** the agent's answer takes your one-line context into account (your role, your situation), not a generic explanation. For the error log, a good agent traces the chain — overheat → trip → reset → overheat → trip → reset → lockout — and points at the airflow warning as the likely root cause (clogged filter / blocked vent), not just "it's overheating".