Part of my point is that a lot of everyday rules do break down at large scale. Like, 'drink water' is good advice - but a person can still die from drinking too much water. And having a few people go for a walk through a forest is nice, but having a million people go for a walk through a forest is bad. And using a couple of quotes from different sources to write an article for a website is good; but using thousands of quotes in an automated method doesn't really feel like the same thing any more.

That's what I'm saying. A person can't physically read billions of books, or do the statistical work to put them together to create a new piece of work from them. And since a person cannot do that, no law or existing rule currently takes that possibility into account. So I don't think we can really say that a person is 'allowed to' do that. Rather, it's just an undefined area. A person simply cannot physically do it, and so the rules don't have to consider it. On the other hand, computer systems can now do it. And so rather than pointing to old laws, we have to decide as a society whether we think that's something we are ok with.

I don't know what the 'best' answer is, but I do think we should at least stop to think about it carefully; because there are some clear downsides that need to be considered - and probably a lot of effects that aren't as obvious which should also be considered!