It is the third criterion that is being targetted by those who would see Pluto reinstated as a planet.

ECONOMIST: Forbidden planet | The

The third criterion, however, is that a person has what are known as restrictive and repetitive behaviours and interests, or RRBI, in the jargon.

ECONOMIST: Autism and extraordinary ability: Genius locus | The

The third criterion is the most important: making good use of what's left when the athletes, the IOC bigwigs and the world's media go home.

ECONOMIST: London's Olympics