Three ways to think about the post-digital age. “In the pre-digital age, products generally did one thing well — whether that was a DVD player, a TV, a magazine — and in the post-digital age everything will work — consumers will move seamlessly between devices, personalisation will be real, data will be secure.”

“The digital world doesn’t really exist any more, Goodwin said: asking a teenager how much time they spend on the internet makes no sense to them — you have to explain what the internet is, when it starts when it stops. “But that has no relevance — it would be like asking us how much time we spend with electricity every day.”

Emphasising the point, he continued: “There is no such thing as online dating, it is just dating in 2018. There is no such thing as mobile banking, it is just how you do banking if you’re not an idiot.

Vox: The Stanford Prison Experiment was massively influential. We just learned it was a fraud. “The most famous psychological studies are often wrong, fraudulent, or outdated. Textbooks need to catch up.”