Nathan Fielder’s unnerving and audacious social experiment treads the frontier of reality TV by doubling down on its artificesOne of the many confounding pleasures of The Rehearsal, the comedian Nathan Fielder’s elaborate social experiment/docu-reality series for HBO, is how often the show exposes its own illusions.The central concept of the series is straightforward enough, if typically absurd: what if you could rehearse fraught conversations or situations in advance? How much could you control... Read this story