User blog comment:Master Sima Yi/Assassinews 02-08-'12 — Official AnvilNext Trailer/@comment-4868246-20120803144801/@comment-4829046-20120804114531

Actually this "Scientists have yet to understand the way depressed trolls think and the source of their pessimism."

I can give you the simple answer. The answer is present in the statement itself. The source of their pessimism is their depressin XD