(On Tuesdays, we have a buy-one-get-one-free deal on medium pizzas. The day this exchange happened was a Thursday.)

Me: “Welcome to ****, how can I help you?”

Customer: “I’d like a medium pepperoni pizza please.”

Me: “OK then. Can I get you anything else?”

Customer: “Well, I wasn’t here on Tuesday, so I was wondering if I could get my second free pizza today?”

Me: “Well, the deal is only applicable on Tuesdays, so I’m afraid I can’t help you.”

Customer: “OK. Well, I won’t be here next Tuesday, so can I get my free one from then?”

Me: “I’m very sorry sir, but the deal on is only available on TUESDAYS.”

Customer: “OK, I’ll be back in a bit to get my pizza.”

(He leaves, then comes back ten minutes later.)

Customer: “So…say I woke up this morning and thought it was Tuesday?”

Me: “…”