Is non-existence absurd? It may be absurd to some philosophers and physicists but that doesn't make it a non-issue. Philosopher John Leslie talks through what non-existence, or blankness, could mean and its place in the history of philosophy. John Andrew Leslie is a Canadian philosopher who focuses on explaining the world’s existence. Educated at Wadham College, Oxford, he earned a BA in Psychology and Philosophy, then an MLitt in Philosophy. He is University Professor Emeritus at the University