I step into my bedroom/office, where Tertius is sitting at my desk, fiddling with his iPod.
"Now I know where you are," he exclaims cheerfully, showing me the screen. It displays a map that is somehow tracking the location of my iPod.
"You know where I am because I'm standing two feet away from you and you can see me," I remark.
"But this is digital, which makes it more official."