Unfortunately it's not quite that simple. The very same real world also contains offers that are customary given on the assumption that the other side says "tha

Unfortunately it's not quite that simple. The very same real world also contains offers that are customary given on the assumption that the other side says "thank you very much I will surely come back to you about this" as part of a politeness protocol but never even considers taking the offer seriously. "Please stay as long as you like" is how the last guests of a party thrown out.