“Turning things over and over in isolation had led me to a certain point, but I knew that to get any further I'd have to voice some ideas aloud, just to see how they sounded. But I certainly didn't go to Ellie expecting any kind of constructive input on her part. It was more that I'd hit a wall and needed someone to talk around the subject with - like when you come up against a problem that's just immune to normal logic.”