Sherlock never had doubts. That’s what’s wrong with him and right with me.
And I really must try to be less obvious in my unfailing drive to observe people. A few of them have started staring back with the potential for confrontation in their eyes, and I want to approach them and say ‘Please don’t take offence. I’m only studying you.’ I suspect it might make matters worse, so I whistle and study something close and inanimate instead.
(Having said which, the young woman in Tesco who so attracts my attention was wearing a hat today. That was most interesting.)