A Third Processor

This essay was an early draft that has been absorbed into the Compressed Medicine curriculum.

The substrate framing — finite agents communicate by compression, and inserting an AI inserts a new codec — is articulated in Part 1: The Compression Substrate. The receiver-architecture treatment is in Part 2: The Function of the Message. The Mayo ambient-scribe hallucinated-physical-exam case is folded into Part 8: The Same Wall as a clinical Silent Reconstruction instance, and the Kalai 2025 citation on training/calibration is in Part 9: The Defense Architecture.

For the canonical treatment, start with the Preface.