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by int_19h 2799 days ago
> I forget the exact case but one counter-example was: you have proprietary library A. Someone makes a GPL implementation B with a compatible interface. You ship software C with instructions that users can use either library A or B.

Are you referring to the discussion between the author of CLisp and Stallman about GNU Readline, by chance?

https://github.com/JoshCheek/clisp/blob/master/doc/Why-CLISP...