I'm thinking about this off the back of the free temporary access that Faithlife has given for The Mingling of Souls, but it would apply to Logos Now users too, I guess. I've highlighted a passage from this book, and I'm wondering if that means the highlighted quote will remain with me if I choose not to keep the book, or if I need to copy & paste the text into a note/take a clipping.
I don't know if any of these rely on the continued presence of the original resource.