" When we arrived at my home north of the city, my five-year-old son Magnus, brimming with the confidence he'd gained in two full weeks of kindergarten, opened the front door and asked John, " Is it true you live in a tent?" " Yes, it is," John said." Why don't you have a house like everybody else?" John leaned in to meet Magnus' dubious stare. " Because I endeavor to remain flexible. "