To the 18th-century German philosopher Immanuel Kant, the ethics of honesty were clear-cut: telling the truth, no matter the consequences, was a ‘categorical imperative’ – a moral duty. Taking chilling (and chilly) inspiration from Stanley Kubrick’s film The Shining (1980), this brief animated snippet details Kant’s inflexible perspective on truth-telling, and its contrast with utilitarianism, which emphasises good outcomes over actions that are always right or wrong.