And in politics, he who underestimates (his opponent) overestimates himself and thus makes an error in judgment.

CNN: French presidential rivals enter final day of campaigning

Since 2006, CDER has expended considerable taxpayer dollars trying to absolve itself of responsibility for this inexplicable error in judgment that cost many lives.

FORBES: Steven Nissen: The Hidden Agenda Behind The FDA's New Avandia Hearings

This is where Goldman made a serious error in judgment.

FORBES: It's Getting Harder To Defend Goldman Sachs

He wrote to IMF staff and said "while this incident constituted an error in judgment on my part, for which I take full responsibility, I firmly believe that I have not abused my position".

BBC: Strauss-Kahn affair turns French politics upside down

Responding to Mr Osborne's attack for the government, Treasury minister Angela Eagle said the shadow chancellor had "missed another opportunity to admit the Tories have made a fundamental error of judgment in failing to support the growing international consensus that governments need to invest to stimulate their economies during the global downturn".

BBC: Tories step up pressure on Brown

Nevertheless, the board found "that the incident was regrettable and reflected a serious error of judgment, " the IMF said in a written statement.

CNN: Ex-IMF chief granted bail amid sexual assault allegations

This president has made, I regret to say, a colossal error of judgment, and judgment is what we look for in the president of the United States of America.

NPR: Transcript of Presidential Debate

In a statement, he said he had made a "terrible error of judgment".

BBC: NEWS | UK | Politics | Rix 'could sue' over Aslef smears

Perhaps the error is in the preparation of the tax returns, but I do not have the expertise to make that judgment.

FORBES: Did They or Didn't They: The Sugar Bowl And Charitable Donations