Things get stranger still when these dream images start to interleave with our own memories. Robert Elliott Smith, an artificial intelligence researcher at University College London, returned from a family holiday in France in 2014 with a phone full of photos. He uploaded a number of them to Google+, to share them with his wife, but while browsing through them he noticed an anomaly.30 In one image, he saw himself and his wife at a table in a restaurant, both smiling at the camera. But this photograph had never been taken. At lunch one day, his father had held the button down on his iPhone a
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