Equally, if the prime minister wants to draw a lesson from an unedifying episode, it should be that too much leash is being given to freebooting ministerial acolytes.

ECONOMIST: Rumour, tittle-tattle and gossip

Shareholders need to draw the proper lesson from these episodes: the condition for good returns is nothing less than their eternal vigilance.

ECONOMIST: Shareholder activism

Even so, it is likely to draw the same lesson from this crisis as it did from the ERM expulsion in 1992: that devaluation is a good thing.

ECONOMIST: The financial crisis has made the euro look more alluring

While doing his best today to draw a line between Jews and Zionists, he seems to have missed a history lesson from a true and honorable freedom fighter whose birthday Americans celebrated on Monday.

FORBES: There He Goes Again: Egypt's Morsi Stuns U.S. Senators In Meeting With 'Jews-Control-Media' Slur

Much theoretical work has been done to understand and model such changes, but the lesson I draw from chaos theory is that recognizing such changes in hindsight may be simple, but predicting them in advance is and will continue to be extremely difficult.

FORBES: Chaos Theory, Financial Markets, and Global Weirding

All of Everton's goals in the 3-3 draw at Stamford Bridge in December came from set-pieces but Chelsea had obviously failed to heed the lesson.

BBC: Sport - Football - Everton 2-1 Chelsea