Assessing job applicants can feel as chancy as deciding which chocolate to pick from among many in a boxed assortment. To paraphrase Forrest Gump, you never know what you're going to really get. And identifying truly creative thinkers can be even trickier, since many interviewing techniques and tests don't predict a person's ability to produce imaginative ideas or solutions quickly. Yet we'd all agree that's who we want to hire. And in an idea economy, it's also who we need ...