Pattern Recognition

Technology marches on. Sometimes I find myself caught entirely unawares by some capability which not only works flawlessly, but which has become almost freely available to the consumer or enthusiastic amateur. I still remember buying a digital SLR camera which had face recognition built in almost as an afterthought. I'd given it no great thought until - with the camera sitting powered-up on a coffee table - I noticed that it was locking in on the picture of the queen's head on a five pound no...