 FACT: Any time Data plays the part of Sherlock Holmes hes shown as  wearing a deerstalker cap and smoking a goose necked pipe. Holmes  only wore a soft cloth cap (drawn as a deerstalker though never said  to be one by Doyle) when in the country, not in the city. Also  Holmes never once smoked a goose necked pipe. That was an alteration  made by an actor who found that it was the only pipe he could hold  between his teeth and still be able to say his lines clearly.  Finally, Sherlock Holmes never once spoke the words "Its  elementary, my dear Watson." That was something else added in a  script but never once written by Doyle. An android would get these  details right.