AT THIS year’s Bafta awards, a moment of pure neurological chaos unfolded. John Davidson, the Tourette syndrome campaigner and subject of the film I Swear, let out an involuntary shout of the N-word while the black actors Michael B Jordan and Delroy Lindo presented an award. Davidson has coprolalia, a severe form of the disorder that forces out taboo words without warning or consent. He did not choose it. He did not mean it. Yet the backlash was swift, vicious and revealing.
