How every reading becomes evidence.

Trace each source through normalization, deterministic calculation, display, interpretation, and its explicit inference boundary.

One directional path, four explicit boundaries

Evidence sources and trust boundaries

Every derived measure states its rule and limit

Formula, cohort, missingness, and interpretation boundary for every analytical transformation
Measure	Rule	Cohort and missingness	Interpretation boundary

Source and normalized fields stay distinguishable

Definitions, units, provenance, and unavailable behavior for fields used in analysis
Field	Meaning	Unit or form	Unavailable behavior

What the interface refuses to assume

Every published figure, recomputed

Each figure the Atlas prints is recalculated from the retained corpus on every publish and compared against the value on the page, at the precision the page prints it. Figures that no longer reproduce are listed rather than quietly corrected, and every figure carries the series or peer group it belongs to — a gap is only judgeable against what the figure has done before.

Cohort: every published figureUnit: gap between shown and recomputedRule: compared at printed precisionLoading

Every published figure, its recomputation, and the series or peer group it sits on — figures that no longer reproduce sort first
Figure	Shown	Recomputed	Gap	In context	Basis

Attention outside Hacker News

What the wider web was reading about the same subjects, drawn from sources that have nothing to do with this corpus. It is here, among the boundaries, because its only honest use is as context for a movement — never as its cause.

Cohort: three curated Wikipedia topicsUnit: daily pageviews, and share of monitored newsRule: 7-day mean against the prior 7 daysLoading

Outside attention on the subjects this corpus is largely about, over the trailing 30 days
Subject	Last 7 days	Against the prior 7	30-day shape