Transaction: Customer pays Supplier £10,000
1. Customer signs: "I paid £10,000 to Supplier"
2. Supplier signs: "I received £10,000 from Customer"
3. Customer's bank signs: "I debited £10,000 from Customer"
4. Supplier's bank signs: "I credited £10,000 to Supplier"
Result: Four signatures on one record. No reconciliation. Proven at source.

The Large Accounting Model proposes a unified economic infrastructure that tracks two forms of accumulation on one ledger: money and knowledge. Period Entry accounting eliminates the general ledger. Cryptographic co-signature by four parties eliminates bank, customer, and supplier reconciliation. Every transaction is proven at source.

But the ledger records more than pounds. It records learning: Competence and its reliability, Collaboration and its reliability, Curiosity and its reliability. The economic drivers — market size, share, price, cost, capital structure — are explicit dimensions within each Period Entry, not hidden inside a black box. The result is a transparent model of the world where knowledge accumulation preempts economic growth, symmetric information increases economic efficiency, and transparency removes corruption.

The End of Reconciliation

Period Entry redesigns double-entry bookkeeping so that every transaction has a temporal lifespan: a start date, an end date, and a value that accrues over time. Accrual builds and unwinds automatically. No adjusting journals. No month-end close. No general ledger reconciliation.

Co-signature eliminates the rest. Four parties sign every transaction — customer, supplier, customer’s bank, supplier’s bank. One record, four signatures. Bank reconciliation disappears because the bank co-signed. Supplier reconciliation disappears because the supplier co-signed. Customer reconciliation disappears because the customer co-signed. The entire reconciliation infrastructure — bank recs, supplier statements, customer confirmations, intercompany matching — collapses into a single proven record.

The Knowledge Ledger

A company’s value is not just its financial capital. It is its financial capital plus the accumulated, reliability-weighted knowledge of its people. The LAM records knowledge through three channels, each with its own reliability score:

CompetenceWhat you know and how reliably you know it. Magnitude × Reliability = the fundamental unit of knowledge.
CollaborationHow well you work with others and how reliably you do so. The coupling channel applied to commerce.
CuriosityHow actively you seek to learn and how reliably you pursue understanding. The leading indicator of future competence.

A network of content providers and human and AI tutors, operating through Oxford-style tutorials where tutoring and assessment are the same act, builds the knowledge side of the ledger. Competence triggers conditional payment release: you get paid when your Competence crosses threshold. Below threshold, the signal is noise. Do not trust it. Do not pay it.

Spennies: The Currency of Learning

Spennies (study pennies) are a dedicated currency issued by a Bank of Learning and backed by the accumulated knowledge of the network. They unify the knowledge ledger: tutors earn Spennies, learners spend Spennies, content providers are paid in Spennies. A presale to early-stage developers and users funds development. Spenny value is backed not by fiat authority but by the measurable knowledge the network has produced.

A Transparent Model of the World

When every transaction is co-signed and every economic driver is explicit, three things follow. Knowledge accumulation preempts economic growth — the knowledge ledger is a leading indicator because competence precedes revenue. Symmetric information increases efficiency — both parties see the same data, information asymmetry disappears, and markets become genuinely efficient. Transparency removes corruption — co-signature prevents unilateral falsification, visible drivers prevent hidden manipulation, and the knowledge ledger prevents credential fraud.

The result is a stock and futures market of everything, where the information barrier disappears, equity in any enterprise can be valued from its ledger, and the economy can run hotter because monetary policy operates on accurate information rather than lagging indicators.

One Computation

Period Entry computes: budget minus actual equals variance, weighted by confidence. The Emotional Comparator Framework computes: expected minus actual equals prediction error, weighted by reliability. A dopamine neuron computes: expected reward minus actual reward equals prediction error, weighted by precision. Three substrates. One computation. Financial accounting and emotional accounting are the same discipline.