We don’t do a lot of involved math with schedules of investments. Certainly we expect a decent return or we don’t do it. We use a lot of experience and do it in our heads. We distrust others’ systems [and complex models] and think it leads to false confidence. The harder you work, the more confidence you get. But you may be working hard on something you’re no good at. We’re so afraid of that process that we don’t do it.