Think more extreme than that, as in “if you’ve ever seen any GPL code whatsoever, it has in some small way impacted your understanding of code and now all code you write forevermore must be GPL” rather than just the codebase of the thing you are re-implementing because that’s the kind of breadth you’d have to apply to the “derivative works” clause in GPL to argue all gen AI code must be GPL because the training data contains some GPL code.