Pens without a p but with a P

Pens lives in Pencilvania, a state filled with her kind. She was once a Human's mightiest toll, but all that is left is a cat's toy. All she does all day is sit around crying about the time she was once an author's pen, hoping that one day an author with the name starting with a R and ends with the first two letters of the 15th word counted backwards starting from here.

One day, she was strolling through the streets of Pencilvania when she noticed something familiar but yet odd, a Human's fingerprint. Through the big and large brain of Pens, she started to form a theory, a theory that has once been gone. Here's the theory :

Humans = Humans - ( B * B * B *)^K

B = brain cells

K = Knowledge

So in conclusions, Humans are brains stuck in a meat mechanical armor.

After her once famous theory brought up to her mind, she started to look around. Looking for what exactly? I wish I could know but I shall respect the private mind of Pens. Once her eyes (I know I know, eye don't see any eyes on pencils too. I guess we see eye to eye) has given up, she went to the CBI, suspecting there is something there.