Six weeks of training wear away the foul speech, double negatives and incorrect tenses.

FORBES: Silicon Valley's Prison Call Center

Propositions tend to be badly worded, with double negatives that leave some voters thinking they voted for something when they really voted against.

ECONOMIST: California

Through the mastery of double negatives, dodging and burning, and other darkroom deceits, talented photographers including Wanda Wulz and Bill Brandt (whose work is the subject of an upcoming MoMA retrospective) made the medium as unreliably personal as the most fantastical painters had ever achieved on canvas.

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The language is dense legalese, often containing double or triple negatives.

ECONOMIST: Citizens are not as well-informed as they think