Well...confabulation is a memory disturbance. I just read an article on it and so 1) "a person may not know that certain information is false". sorta like lying...but not intended as that 2) ya, really has nothing to do with that 3) confused yes. and..yes. partially. 4) hmm, didn't think of that. It may come with loss of memory, but its not as specific as that.
The stem of a plant can be compared to the skeleton of an animal. It is responsible for supporting the plant and holding the leaves up to the sunlight, just like the skeleton provides support for your body.