qqp question1: "What is the difference between ""Regards,"" ""Best regards,"" ""Sincerely,"" ""Yours Faithfully,"" and all of the other formulations? Which one is the best to use in North America in an email conversation?" question2: "What is the difference between "" F**king-Unbelievable "" and "" Un-F**king-believable ""? Which one is best or we should use ?"