The doc for (setq-default indicate-empty-lines t) is confusing for me. C-h v indicate-empty-lines tells "Visually indicate empty lines after the buffer end." But how can you have empty lines after the buffer end? There is nothing after the buffer end!

Take a look at this screenshot: https://i.imgur.com/tzcDdYKl.png Line 10 is the last line of the buffer. There is nothing after Line 10. The fringe bitmap indicator shows the void (limbo?) after the end of the buffer. But the doc refers to this void (limbo lines) as "empty lines". Why?

Aren't Lines 6-10 empty lines? Lines 6-10 are actual lines that contain nothing but \n. Aren't these the empty lines - the blank lines?

Isn't everything after Line 10 limbo? visual representation of lines that don't exist / end of buffer? Help me understand the Emacs terminology? Why lines that don't exist are called "empty lines"?