Deliberate ignorance has been known as the 'Ostrich Instruction' in law courts since the 1860s. It illustrates a recurring pattern in history in which figureheads for major companies, political leaders and industry bigwigs plead ignorance to avoid culpability. So why do so many figures at the top still get away with it when disasters on their watch damage so many people's lives? Does the idea that knowledge is power still apply in today's post-truth...