My wife has Alzheimer's but won't admit it. After lunch she likes to go for a walk, which can last up to two hours. I go with her, of course, and do my best to ensure that she stays a good distance from other walkers and cyclists, but she likes to chat to people, especially those with small children or dogs. I explain over and over again the need to keep two metres away and she does sometimes say she will, but then she appears to forget and if I take her arm and try to steer her away from other she gets angry. One day last week on a narrow pavement where we had to walk in single file a young woman had to quickly pick up her small daughter and step into the road to let my wife past. On another occasion in a park she went right up to someone for a chat just after I had reminded her to keep two metres away and afterwards when I said that wasn't two metres she insisted it was. It has made me wonder whether the problem is not entirely forgetfulness or even disbelief in the need for social distancing, but a problem with spatial awareness.