PROSPECTIVE TENANT: I don't know... the windows seem a bit small.
OWNER: No, no, they're nice and big. Airy! The apartment is positively airy.
PROSPECTIVE TENANT: But the windows! Look at them! They're about six inches tall.
OWNER: Clearly you are mistaken. Look at the curtains! Nobody would put such long curtains on six-inch-tall windows, would they?
PROSPECTIVE TENANT: I see your point. I'll sign the lease now, please.
(Found by Christian and Gareth.)