Customer: “Excuse me, will my son like this for his birthday? He loves dinosaurs.”

(I examine the gift; it’s a set of various plastic fossils.)

Me: “Well, it depends on how into dinosaurs he is. If he just thinks they’re cool, then it’ll be fine. If he’s into palaeontology at all, though, he’ll be disappointed because none of those are actually dinosaurs.”

Customer: “What? Don’t be stupid! He loves dinosaurs! I know what a dinosaur is!”

Me: “Well, right there you have a Pterodactyl, two Synapsids including the famous Dimetrodon, a Plesiosaur, and a Tiktaalik. None of those are dinosaurs. They’re not even all reptiles, or Mesozoic.”

Customer: “What do you know? God, you kids these days are so rude! I know what a dinosaur is.”

(She buys the toy set and leaves in a huff. A week later, I’m working as a cashier when she comes back.)

Customer: “Yes, I’d like to return this.” *shows me the very same fossil toy set*

Me: “Oh, yes, I remember. Would you like me to help you find a dinosaur toy to get instead?”

Customer: “You? God! Look, missy, he just didn’t like them because they weren’t scientifically accurate, okay? These are dinosaurs! They lived a thousand years ago! Do you think I’m stupid!?”

Me: “Ma’am, you clearly are just as intelligent as you present yourself to be.”

Customer: “Well, I’m glad you realise it.”