Explaining what they do tick by tick on a continuous basis has as much value as trying to come up with a rational explanation why the ball landed on the 9 on the roulette table in Bellagio instead of 10.

FORBES: No Default As Long As The Fed Has A Printing Press

The deep concern is a lack of any rational explanation for these acts.

BBC: Hounslow man jailed for slashing women

This also strikes me a less convincing explanation: people are not that rational, surely.

ECONOMIST: European politics