One thing that is accurate from Sherlock Holmes is that you can discern more about most people than they think they are revealing by paying very close attention and having a whole lot of background knowledge.
My partner says that I “do my Sherlock Holmes thing” sometimes and I take that as a huge compliment. Seeing more than most people means you have to have done more with your mind than most people in the past.
And that’s always been my aim — but I don’t do it within other people’s parameters. And never will.