What happens when you don't save your document?
The information isn't entered into any physical memory, and RAM
isn't a permanent storage unit, so the information is lost forever
unless you do commit it to physical memory of some sort (harddrive,
memory card, USB, ect.)
It is different if you delete something from memory, as the
information is merely marked as deleted and the space is freed for
overwriting, but it is still there until it is overwritten, so you
can access it.