The ledger is an event-sourced system: an immutable log of events (entries), where every balance you ever see is a fold…

HighlightBuilding an Accounting Ledger · Day 1

The ledger is an event-sourced system: an immutable log of events (entries), where every balance you ever see is a fold over that log. "Edit the past" is forbidden for the same reason you don't rewrite a Kafka topic.

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This is one tell — the giveaway that AI is bluffing. It comes from Building an Accounting Ledger, a short daily course on Noesa. Anyone can use AI; few can tell when it's wrong.

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