I was interested by that news story, and thought about it as I mowed the lawn. It seemed odd to me that they ruled out the person who had found a pen and started making a 'to do' list. Surely, that is a person who is not only comfortable alone with their thoughts, but has decided that their thoughts were so useful, they were worried about forgetting them and wanted to record them for their future convenience?
One thing I sometimes like to do in my head is design elaborate rabbit houses. It seems an odd and arbitrary division to say that you are alone with your thoughts while you work out how the doors would be secured and what materials to use for the roof and how to cut a pleasing set of curved windows that could be shuttered in the winter, but to say that as soon as you start to draw the thing on paper, you are somehow operating outside your head. I often write things in my head, but my head has very poor storage facilities so I forget them. Otherwise this blog would have a lot more stuff in it.
I wonder what people who would rather shock themselves with electricity than be alone with their thoughts, think about while mowing the lawn or hoovering? I can't believe anyone thinks about the mowing.