It's the last part the temptation to believe that everything can be fixed that Mr. Mamet thinks is the fatal error.

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After all, at least he did not repeat his mistake after an 11-year-long opportunity to study and learn the fatal error of his ways.

CENTERFORSECURITYPOLICY: Center For Security Policy

America may not be as aggressive as it has been in the recent past, but Obama's record -- the surfeit of caution regarding Syria aside -- suggests it would be a fatal error to test this cool hand in the White House.

CNN: Does North Korea think U.S. going soft?

The most simplistic, though often fatal error made is to assume brand value is simply an inheritable asset.

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The decision to compete in the Iowa caucuses -- despite a cautionary internal memo counseling her to skip the contest -- may have been one fatal error.

CNN: Analysis: Why Clinton's bid failed

And, quite frankly, we saw, Chip, what happened in the middle of last week when violence was entered into this equation, which is why the Prime Minister came out the next day and talked about what a fatal error that had been.

WHITEHOUSE: Press Briefing

This tiny error proved fatal, because Mars Climate Orbiter was supposed to pass over the planet's surface at an altitude of 140km.

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It was the worst of both worlds as a fatal passivity was perceptible when, ironically, an admission of error could have communicated a corporate fiber of sterner stuff.

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