I’ve had a cold for the past few days. Nothing serious, but it affects my ability to think. The funny thing is that my loss of brainpower is very gradual. Over a period of three or four days my (admittedly tiny) intellect slowly leaks away. Then it stays away for about five days (the cold proper). But then it comes back in a matter of an hour. Suddenly, my brain is open for business again and full of ideas. It wants to make up for lost time. It is inconvenient when this recover process starts at one o’clock in the morning.