WE RECEIVED THE following letter from a woman in Yonkers, N.Y.: "Dear editor: This debate made it clear: John Kerry is a leader we can trust to tell us the truth when it comes to our nation's security. George Bush has had his chance; I'm ready for a new direction." Cogent, succinct, personal -- everything we look for in a letter. So why are we writing about it here, instead of publishing it in the columns to the right? Unfortunately, the letter, perfect in every other way, arrived in our electronic in-box Thursday afternoon, four hours and 14 minutes before...