"Think of it as a fuzzy boundary between the mantle and the core, with patches perhaps 10 to 20 km (6 - 12 miles) across and up to a 1, 000 metres (3, 280 ft) thick, " Jeanloz said.

BBC: Earth's wobbles reveal deep secrets

One might argue that consent loses meaning after death, but with advances in genomics, this boundary is becoming fuzzy.

FORBES: The Frontiers Of Medical Privacy

However, the boundary between what is personal and what is open is fuzzy.

WSJ: 'Open Data' Brings Potential and Perils for Government

But the fuzzy warmth clearly didn't rub off on whoever wrote the DUP's response to the Westminster boundary commission's proposals.

BBC: Peter Robinson takes the grandstand view