Learn
Memory retention
Retention in Fluorgan is not a promise: it is an operational reading of reviewable memory.
Core idea
Predicted and observed answer different questions. One depends on the current model; the other comes from qualified reviews.
Use in Fluorgan
The system shows low evidence, gaps, and `null` when data is insufficient instead of filling charts with zeros.
research_needed
No complete external source exists in the repo for publishing a scientific statistic; keep product and contract wording.