Perhaps that's too reflective an activity for Silicon Valley start-ups. They probably take an interest in more engaging activities. But it seems to me that someone may be able to make a fortune from a head-scratching app. And with all the time that's being "freed up" for us through time-saving, and similar, technologies, we'll probably have lots of time for reflective head-scratching. Then again, even without time-saving technologies there are still many of us who enjoy doing that ourselves.