Times are changing. Kathy Sierra features a timeline on her blog which suggests that the 1970s and 80s were about how well we could learn, the 1990s and 2000s focused on how fast and how much we could learn, whilst today's education should be based on how much we can unlearn. And, she says, learning to let go of old and out of date rules is one of the skills we all need to develop. Futurologist Jack Uldrich is applying the same principle to the medical profession, arguing that the key to unlearning is to come to the realisation that 'we are all in a fog', and can't clearly see the future. Unlearning will be a strategy for coping with rapid change and uncertainties, he argues.