The exhibit makes its case by presenting a variety of innovations, including mass-produced goods and the first known system of writing.

WSJ: The Ur-Metropolis | Uruk | Pergamon Museum | By A.J. Goldmann

Guadalajarans sometimes offer it up as Exhibit A for the case that the city is a civilized place where life goes on unmarked by the violence that disfigures large parts of Mexico.

NEWYORKER: The Kingpins

Remember that in the spring and early summer of 2010, Alistair Darling's borrowing forecast in 2014-15 was exhibit A in Mr Osborne's case for greater fiscal austerity.

BBC: Mr Osborne's unwelcome statement

The doves also have an exhibit from the labour market to back their case: the decline in the rate of increase in average earnings in the past six months from over 6% to less than 4% a year.

ECONOMIST: Interest rates