IP attorney here that specializes in this stuff.

No, because that would be a reproduction of the original or a derivative work under copyright law, and those rights are retained by the copyright owner. Thus, it would be copyright infringement. The issue becomes fuzzier when you consider the temperature or entropy of a particular algorithm.

There is a lot more to this topic, but that is the gist that answers your specific question under US law right now.

That’s not how it works - the original author of the input owns the copyright for the work and if the output of the LLM is the same or a close derivative, the that copyright will be infringed. The ruling only means that YOU can not claim copyright for something that LLM spit out and you put your name on.

I've seen that discussed as a genuinely serious problem for open source code. LLMs can be used to try to strip off a license.

The key word in all this is "transformative."

If you turn a thousand books into one book that's not quite like any of the others... congratulations, that's how writing works. Most authors read.

If you turn one book into the same book, that's plainly not the same thing.