What is truth, what is lies

The line between truth and lies is often blurred, how can you tell which is which?

The sky is blue
The sky is black
My name is jill
My name is jack
I am alive
Yet I am dead
I'm seeing white
I'm seeing red
I am fake
But I am real
Want to live
Don't want to feel
I am hurt
No, I'm fine
I've gone off course
Stayed on the line
I am okay
In so much pain
I am mad
And I am sane
What exists
What is disguise
What is truth
What is lies

This is all so weird
What is it about
I have no idea
You figure it out