The working A prototype: use its controls to test the build question.
Recover evidence, assumptions, alternatives, dissent and outcomes behind an important decision.
RN conceived the question, structured the evidence boundaries, designed the experience, implemented the prototype and documented its limits.
This independent prototype demonstrates an approach; it is not a deployed client system, professional advice or proof of real-world outcomes.
Work through the controls with a situation of your own rather than the sample values. The tool responds to what you put in, so the useful output comes from real input, and everything is processed in your browser as you go. Any sample content you find already loaded is there to show the shape of a filled-in state, and you can clear it and start again at any point.
The build overview sets out the question, the purpose, the role and the evidence status in one place, and the public record behind it states what changed, what another person can reuse and what supports the system. If you want to judge how far this build should be trusted, the record is the page to read, not this one.
SYNTHETIC DECISION TIME MACHINE
Why did we decide that?
Compare what the fixed record says was known then with outcomes, evidence and append-only corrections recorded later—without rewriting history.
RECORDED DECISION CONTEXT
THE ORIGINAL RECORD IS NEVER REWRITTEN
2026-01-10T10:00:00Z · DECISION · ALT-A selected in the synthetic record.
2026-01-10T09:00:00Z · EVIDENCE · Synthetic cost note recorded.
2026-01-10T09:10:00Z · ASSUMPTION · Synthetic capacity was assumed available.
2026-01-10T09:20:00Z · ALTERNATIVE · ALT-A: staged rollout.
2026-01-10T09:21:00Z · ALTERNATIVE · ALT-B: wait for more evidence.
2026-01-10T09:30:00Z · DISSENT · Synthetic dissent requested a smaller scope.
2026-02-01T12:00:00Z · OUTCOME · A later synthetic outcome was recorded.
Boundary: This record does not prove what anyone knew, why they acted, whether authority was valid, what caused an outcome, or whether the decision was reasonable, complete, correct, lawful, negligent or accountable.