Because they won't commute.
Loinback.
You can't fire me! I snappopcrackleaaaaaargh!!!!
Student : By Staying at home. :p
Me: Showering is optional Her: HAHAHA, be serious. Me: Ok, no drug tests.
He gets lost every time he checks the speedometer.
So he would stop getting lost everything he checked it.
When they find the position, they can't find the momentum. When they find the momentum, they can't find the position.
He was just minding his Ps and Qs.
Because cross products don't commute!