Because they spend too much time with the x-position
Nathan Filaments () X-Post from /r/DestinyTheGame
You look at your X and try to find out Y
When the power goes off.
Staying up all night wondering if there really is a dog.
Explaining his wife.
You spend 10 hours a day doing nothing but clearing lines.
When they find the position, they can't find the momentum. When they find the momentum, they can't find the position.
You triangulate their position!
A park bench can support a family.