"One of these artworks does not exist" is a website randomly displaying two works of art: one of them exists, the other was created "in the style of" with the generative artificial intelligence program Midjourney. Users are challenged to guess which artwork really exists in less than 10 seconds. This remixed version of the Turing test - a test originally called the "imitation game" - measures the participant's ability to distinguish a human artistic creation from a machine's imitative output. As inevitable errors in judgement happen, it becomes a silly game to explore the notions of fake and authenticity, originality and style, and question the relationship between images and our artistic judgement. It was developed by creative studio Matter of Fact for recreational purposes only. Sincere apologies to all the great artists looted for the purposes of this experiment.