But that's the point he tries to make. When you "teach" LLM with some knowledge, you teach it a set of patterns. It won't necessarily drop the code that infringes copyright. Say you load Gumroad code into Gemini Pro context and say something like: "Check this app. Analyze the implementation of feature XY... I need you to help me implement feature XY... but in Go". Then, you can recreate an entire platform that will look nothing like the original but will have the same features and open source it.