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  • Donald Knuth on Claude Opus Solving a Computer Science Problem
    Donald Knuth, who, adorably, effectively blogs by posting TeX-typeset PDFs: Shock! Shock! I learned yesterday that an open problem I’d been working on for several weeks had just been solved by Claude Opus 4.6 — Anthropic’s hybrid reasoning model that had been released three weeks earlier! It seems that I’ll have to revise my opinions about “generative AI” one of these days. What a joy it is to learn not only that my conjecture has a nice sol
     

Donald Knuth on Claude Opus Solving a Computer Science Problem

8 March 2026 at 17:49

Donald Knuth, who, adorably, effectively blogs by posting TeX-typeset PDFs:

Shock! Shock! I learned yesterday that an open problem I’d been working on for several weeks had just been solved by Claude Opus 4.6 — Anthropic’s hybrid reasoning model that had been released three weeks earlier! It seems that I’ll have to revise my opinions about “generative AI” one of these days. What a joy it is to learn not only that my conjecture has a nice solution but also to celebrate this dramatic advance in automatic deduction and creative problem solving. I’ll try to tell the story briefly in this note.

(Via Simon Willison.)

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  • Can Coding Agents Relicense Open Source Through a β€˜Clean Room’ Implementation of Code?
    Simon Willison: There are a lot of open questions about this, both ethically and legally. These appear to be coming to a head in the venerable chardet Python library. chardet was created by Mark Pilgrim back in 2006 and released under the LGPL. Mark retired from public internet life in 2011 and chardet’s maintenance was taken over by others, most notably Dan Blanchard who has been responsible for every release since 1.1 in July 2012. Two days ago Dan released chardet 7.0.0 with the f
     

Can Coding Agents Relicense Open Source Through a β€˜Clean Room’ Implementation of Code?

8 March 2026 at 17:59

Simon Willison:

There are a lot of open questions about this, both ethically and legally. These appear to be coming to a head in the venerable chardet Python library. chardet was created by Mark Pilgrim back in 2006 and released under the LGPL. Mark retired from public internet life in 2011 and chardet’s maintenance was taken over by others, most notably Dan Blanchard who has been responsible for every release since 1.1 in July 2012.

Two days ago Dan released chardet 7.0.0 with the following note in the release notes:

Ground-up, MIT-licensed rewrite of chardet. Same package name, same public API — drop-in replacement for chardet 5.x/6.x. Just way faster and more accurate!

Yesterday Mark Pilgrim opened #327: No right to relicense this project.

A fascinating dispute, and the first public post from Pilgrim that I’ve seen in quite a while.

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