Dr Nicholas Southwood of ANU Philosophy presents a TED talk in Canberra on the dangers of the 'just not feasible' device.

'We constantly reject ideas, no matter how desirable, for being “just not feasible. “A universal currency is just not feasible.” “Shark nets on all suburban beaches is just not feasible.” And so on. The “just not feasible” device is a powerful and valuable tool. But it is also a tool that is especially liable to being misused. There are serious and under-appreciated dangers associated with the way we form and deploy feasibility judgements. We often go wrong when we judge that certain ideas are not feasible. And even when we are right, we are often wrong to reject those ideas.'