(I work at a house museum that specializes in Revolutionary War era history (1770s). In the gift shop, I am ringing a woman and her son out.
Me: “Okay, so you’re buying a quill pen for $2 and some ink for $3. We don’t have tax, so your total will be $5 even.”
Customer: “No taxes? Is that because taxes hadn’t been invented back then?”
Me: “Actually, taxes are what we fought the whole Revolutionary War about.”
Customer: “What war?”