Education Is Not Equal To Intelligence

A regular customer with a PhD brought a timer to me.

Customer: “Why isn’t this working anymore?”

Me: “Have you changed the battery?”

Customer: “It has batteries?”

A few months later, he came in with a headlamp.

Customer: “This isn’t working. And I changed the batteries!”

I fixed it.

Customer: “How did you do that?”

Me: “I replaced the bulb.”

Customer: “It has a bulb?”