Washington journalism has about it a peculiar insularity. Who gets credit for groundbreaking reporting is not important to most readers, but Washington editors often try to knock down each other's stories and want to be credited when they think they've broken a story first. I know; I've done it. So a memo from Knight-Ridder's Washington bureau that criticized The Post, leaked to a popular media news Web site Friday, was not viewed with equanimity in The Post's newsroom. snip The most serious issue was Hoyt's questioning of figures cited in a front-page story in The Post on Tuesday -- that...