My personal opinion is that, under reasonable circumstances, if you type the words yourself (that is, if your fingers make the keyboard clack), you own them. That definition explicitly excludes copy-and-paste.

The simple act of forcing a roundtrip through your brain and muscles might seem like a small barrier, but I think it's actually a big step in terms of forcing you to interact with the text and take ownership. It's also not practical to do for large blocks of text, and likely will find you putting your stamp on and slightly rewriting even medium-length passages. Both of which are features of the definition.