According to Oxford Dictionaries the word of the year for 2016 is post-truth. This is a slippery little adjective because while some things are pretty much objectively true, the use of post-truth in many contexts is merely a way of shutting down opinion. It’s especially pernicious when it comes to ideas and philosophy because it assumes that the person using it knows what the truth is, yet the world’s sharpest minds can’t always agree on that As the great Ambrose Bierce defied truth in his caustic Devil’s Dictionary: ‘Discovery of truth is the sole purpose of philosophy, which is the most ancient occupation of the human mind and has a fair prospect of existing with increasing activity to the end of time’. And there’s a good reason why in the Bible Pilate’s question ‘What is truth?’ is met with silence.