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concepts → Quantity

Quantity

Mutual information

timeless2 connectionsdraft

how much knowing one thing tells you about another

the formal statement

Where it sits

The prism has six jobs across and eight layers down. Its primary cell ismeasure × L0. Hatched cells cannot exist — a GPU does not learn, an institution does not infer.

What must come first — and what it unlocks

Left to right is reading order, derived from the prerequisite_of edges. Nothing here is hand-ordered: the diagram is the graph.

EntropyMutual informationnothing depends on it yet — a leaf in the reading order

Before it: Entropy

Where to read it

The chapter that introduces it, and any chapter that uses it again.

07Distance Between Beliefsact 1 · The Substrate

Where it comes from

bookElements of Information Theory (2nd ed.)Thomas M. Cover, Joy A. Thomas · 2006
paperA Mathematical Theory of CommunicationClaude E. Shannon · 1948

Every connection

All 2 edges touching this node, grouped by relation family — the sections above are highlights from this list. Colours match the relation families inthe atlas.

Order · 1
requiresEntropyQuantity
Contrast · 1
is dual toEntropyQuantity

This page is a projection of one node in src/data/concepts.ts. It has no prose file of its own — 230 declared edges produce all 236 of these pages. Edit an edge and both endpoints change.