First things first: Much to our own surprise, the [edit: second] most populous city in Eastern Washington (which is everything east of the Cascades, people; it's in Wikipedia, so it must be true) is Spokane Valley. We know. We thought it was Yakima, too. Turns out that when we triple-checked it, all the sources we had cited the 2000 census—but Spokane Valley incorporated in 2003, after the census. We stumbled into a trick question, but......