Quote:
Originally Posted by TheEnthusiast  Tiredness can be caused by several different factors. Here is a list of some common causes of tiredness 
a recent illness
a current illness
pregnancy
bereavement
moving home
divorce
work problems
jet lag
boredom
lack of sleep
some type of poisoning
a vitamin or mineral deficiency
anemia |
While you have listed some things which can be causative factors in situational depression I would also add endogenous depression and other forms of depression not of a temporary nature.
Thanks for posting your list.