Mirrored sources

A laboratory built around the bacterial flagellar motor. It holds a deterministic reduced model of the motor, analysis of recorded single-motor events, and a cross-study parity programme. Alongside those sit the scientific gates the work has to clear, and independent audits of both the model and the repository around it. The framing throughout is hierarchical active inference.

It is for a reader with a scientific interest, and especially for one who has come to check whether a model fit has quietly become a claim about biology. The laboratory's central discipline is a labelling one: every visible layer carries exactly one class — recorded observation, structural reconstruction, reduced model, or physical teaching analogue — and those classes may not be blended. Behavioural observations of one species are held apart from structural work on another, so that nothing on the page can read as a single measured specimen.

Start with the Living Science Walkthrough, which sets out those classes and the truth contract they belong to. Then the scientific and mathematical contract, then the parity gates, which state what would have to hold before a parity claim could stand.

What it is not: a claim of biological parity. The walkthrough is explicit that the release does not turn a model fit into a biological identity claim, and full biological parity is recorded as false and printed as false. Passing this repository's software tests is necessary here and is not the same thing as agreement with a living motor.