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Wartime Bletchley, she said, was about bringing together technology and people in order to crack what seemed like insolvable problems - and that remained the priority today even in a very different world.

“One of the things that I find most infuriating about health inequities is that they are so endemic that people believe they are insolvable, and that makes me ill,” Burke Harris said.

“These are not insolvable problems,” said Marion Nestle, a food studies professor at New York University.

Today we are leaving the next generation almost unbearable and insolvable problems while we live unsustainable lifestyles artificially enabled by borrowing and spending, and an addiction to fossil fuels.

It also shows how each side is locked into an unending and insolvable cycle of violence.