"The Matrix makes numerous references to philosophy including Buddhism, Vedanta, Advaita Hinduism, Christianity, Messianism, Judaism, Gnosticism, existentialism and nihilism. The film's premise resembles Plato's Allegory of the cave, Descartes's evil demon, Kant's reflections on the Phenomenon versus the Ding an sich, Zhuangzi's "Zhuangzi dreamed he was a butterfly", Marxist social theory and the brain in a vat thought experiment."