‘His ignorance was as remarkable as his knowledge.’ No, this is not Col Shankar raving about his friend again. That’s Dr John Watson summing up his good friend Sherlock Holmes in A Study in Scarlet, the first of their adventures. In the novel, the good doctor, like the good colonel here, is astonished at how Holmes is not only ignorant of famous philosophers and theories; he also claims to not know that the earth travels around the sun or what constitutes the solar system.