I don't know anything anymore

I guess this line is quite famous anywhere...

It is use when a person is totally confuse and the brain start to stop working
causing the person unable to think as per normal

So at this point that brain will say
I don't know anything anymore

Let me give you all some examples

In a game,
the main character is helping another character to the fullest.
But in the end the main character was told that the other character was the source of all evil.
What the main character was helping it actually part of a bigger plan that try to destroy the world!
The main character then was question for his doing and his next plan, to continue with the evil plan and rules the world together or kill the other character and save the world
This time the main character will most likely says
"I don't know anything anymore"

In real life... Let say in relationship,
The girl you like didn't like you...
But you don't know why...
You felt that you did things that you believe should had made her happy
But end up things got worst between you 2 end up you got rejected
You totally dun understand why... At this time you will very sad and confuse...
So you say
"I don't know anything anymore"
Maa... This is until the girl tell you why you got rejected and you got no choice but to admit your wrong... But still you will be in confusion.

Another real life example...
You are reading someone's blog... that person blogs everyday and talk about his life everyday
Different day different things happened to him...
Then one day his tell you this...
All my blog post as written 2 days before it got post out...
This time you sure will be confuse...
If you are not you are too carefree then...
But still say this line out for fun
"I don't know anything anymore"

Aww... that all the examples I have... I guess I am writing this post 2 days before I post too