This year, Brockman asked: "What scientific concept would improve everybody's cognitive toolkit?" He took as his starting point James Flynn's notion of "shorthand abstractions" -- "concepts drawn from science that have become part of the language and make people smarter by providing widely applicable templates ('market', 'placebo', 'random sample', 'naturalistic fallacy', are a few of his examples)". If we have a shorthand linguistic means of expressing the notion, Flynn suggested, we can use it as an element in thinking and debate. "This is the most challenging question we've put forth to date," Brockman said. Daniel Kahneman, the father of behavioural economics, said: "It is my favourite question ever. You will get great responses and actually move the culture forward."

On Saturday Brockman published this year's submissions, more than 150 answers from the likes of Craig Venter, Brian Eno and Steven Pinker (mostly men, it has to be said, with contributors such as Alison Gopnik and Lisa Randall making up a small female minority). A number of Wired contributors have sent in answers this year, writers such as Jonah Lehrer, David Eagleman and Matt Ridley. Some journalists and editors were also invited to add their thoughts, which is how I submitted a proposal for "personal data mining" as part of the symposium.

So what concepts did the contributors suggest that we need? The answers included: