When I arranged to come over on Tuesday to see Sherlock’s flat, I had no idea of what was going to happen. When I was looking around the room I wanted to rent, suddenly a police officer came in. 2.3. Somebody had been murdered. Sherlock decided to investigate and asked me to join him. In the taxi, he explained how he had deduced everything about me the previous day. I could try to explain it here but I think it’s better if you go to his site, www.thescienceofdeduction.co.uk, and see for yourself how his mind works.