[qarl]

But why should separate licensing be required at all? A search engine reads and indexes every word of every page it crawls. No one argues that requires licensing, only that the outputs must respect copyright. Why should training be different?

[SahAssar]

When google starting outputting summaries people asked the same questions.

If you supplant the value of the original with the original as input then you probably have some legal questions to answer.

[qarl]

But that's about the output, not the training. We agree: outputs that supplant the original are the problem. A model constrained to produce only fair use outputs causes no such harm — regardless of what it was trained on.