may find regards cold. >> i think regards sounds like a british way to sign off. >> yeah, it does. >> here is another one. best. it's like this is not much of an effort, right, if you just write best. pros and cons, can sometimes feel abrupt, but good for anyone from acquaintances to strangers to bosses. sincerely. that's the one i remember to write in cursive in third grade. pros and cons. ubiquitous, emily post calls it the best end to go a formal social note. >> i'm suspicious. anytime you announce your sincerity, i have doubts about it. >> how could you read that much into -- >> well, whatever. i cover politics. whenever i hear a politician saying, honestly, you're lying. and then when you just write your name, it says, i have no time for nonsense. i don't want to waste your time