I know this happens to other people. Out of the corner of your eye you spot someone who you know is dead. When you stop and look again – which you must – it’s clear the person is someone else, a stranger. Much the same happens to me with the occasional voice. It sounds just like such-and-so, but of course it’s not. Here’s the thing, though. This happens with some people who’ve died and not others; that is, in my world certain people “turn up” in a phantom way, while others who’ve died, stay dead. I wonder what differentiates the two.