I need to stop reading when this **** retard talks about psycology/mental health.
Being married to a counselor, and have multiple friends who have served overseas I can promise you it's real. Find someone that served in 'nam and just sneak up on them like a enemy would have and watch what they do.
No. That's not the way you would do it if you were to try to find out if it is real. To find out if it's real you would talk to people while making sure there was no way you would know if they were in a war or not, etc., and see if you saw something you could measure that said there is an indentifiable disorder.
When it comes to physical disorders there are hard, concrete diagnostic tools. Like if someone is vomitting and has the runs you can take a stool sample. And let's say you identify norovirus in the stool sample. Then you know they had gastroenteritis caused by norovirus infection. There are hard and fast, unequivocal symptoms such as throwing up uncontrollably and repeatedly and there is a pathogen identified in the stool that accounts for it. NOTHING in psychology or psychology is like that. It's a "soft" science.