One piece of information – a supposed engagement to a schoolfriend, Amy Holmes – stands out. A Facebook "joke" that seemed faintly funny for about a week several years ago was undone by hiding it from any and all Facebook users, friends or otherwise (to avoid an "… is now single!" status update). The forgotten relationship helpfully explains why Facebook has served me up with badly targeted bridalwear adverts for several years, and reassures me that Facebook doesn't know quite everything.