Right. I can publish the work in whole without asking permission. That’s unrestricted duplication.
However, as i read it, an LLM spitting out snippets from the text is not “duplicating” the work. That would fall under modifications. From the license:
> A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.
I read that pretty clearly as any work containing text from a gnu fdl document is a modification not a duplication.
1) Obtaining the copyrighted works used for training. Anthropic did this without asking for the copyright holders' permission, which would be a copyright violation for any work that isn't under a license that grants permission to duplicate. The GFDL does, so no issue here. 2) Training the model. The case held that this was fair use, so no issue here. 3) Whether the output is a derivative work. If so then you get to figure out how the GFDL applies to the output, but to the best of my knowledge the case didn't ask this question so we don't know.