Checked fact 179318 Oct 2026Research

Lean's reference manual says: 'Lean's trusted kernel is a small, robust implementation of a type checker for the core type theory.'

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The exact words it rests on

Lean's trusted kernel is a small, robust implementation of a type checker for the core type theory.

What the source said when we opened it, on 18 Oct 2026.

The source

Lean reference: Elaboration and Compilation
Lean FRO / Lean project

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Checked

Checked by the notis newsroom on 18 Oct 2026, against the source above.

In the story

How Lean checks an AI-written proof, and where that stops 18 Oct 2026

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“Lean's reference manual says: 'Lean's trusted kernel is a small, robust implementation of a type checker for the core type theory.'.” ai notis, checked 18 Oct 2026. Source: Lean reference: Elaboration and Compilation (Lean FRO / Lean project). https://ainotis.com/c/1793

As a reference (APA style)

ai notis. (2026, October 18). Lean's reference manual says: 'Lean's trusted kernel is a small, robust implementation of a type checker for the core type theory.' [Checked claim 1793]. ai notis. https://ainotis.com/c/1793

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