Easy way to prove this theory.
Pick up a rock and yell at it in your most genuine, mean, angry voice that it:
Is a completely useless waste of matter that doesn't deserve to live, has bad breath and no one likes.
The reaction - nothing.
Do it to a person, and they will probably burst into tears or belt you in the nose.
You said the same words, in the same voice. The only thing that changed was the object being yelled at.
