Is their work present in v7?
Yes. Commits clearly show in progress where both LGPL and MIT code was working together. This clearly show they are a derivative work and MUST follow the original license.
Plus the argument put forth is that they can re-license the project. It's not a new one made from scratch.
Yes. The AI operator posted this as the prompt: https://github.com/chardet/chardet/commit/f51f523506a73f89f0...
which, minimally instructs it to directly examine the test suite: `4. High encoding accuracy on the chardet test suite`