A man says to his friend, over drinks one day, “I don’t believe in violence.”
His friend calmly sets down his drink and then punches him in the face. “Do you believe in violence now?” he asks.
“No! What the hell was that?”
His friend punches him again. “Now do you believe in violence?”
“No!” The man protests again. “Why do you keep hitting me?”
His friend punches him in the face one more time. “How about now?”
“No, please stop hitting me!”
The friend shrugs and picks his drink back up. “Well, I’ve showed you it exists three times now. If you still don’t believe, that’s just willful ignorance.”