Magritte: This Is Still Not a Pipe review – brilliance and trash from the surrealist who sullied Freud

<p><strong>Gagosian Gallery, London</strong><br>With his clever conundrums, the Belgian loved satirising both psychoanalysis and surrealism – and occasionally painted rubbish to annoy his family. What a dude!</p><p>René Magritte is the most inexplicable of artists