A Memory From Sixth Grade

Just heard: “Greetings, I actually met you about 34 years ago in your 6th grade class at the PUC elementary school. I was a college student observing the class and I remember one of your peers challenged you about something, and you retorted back “Can you prove you exist, can you!” with an air of philosophical certainty. The student was totally lost and couldn’t say a word. It was as if you had pushed his mute button! And I chuckled to myself.”