It is a common error for people to get confused about whether they have had tax deducted and fill in the wrong boxes.

BBC: John Whiting, tax partner, Pricewaterhouse Coopers

This is a common enough error.

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The company that had let him go had made a common but huge error.

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Or you may be making a common body language error and reading too much into one nonverbal signal.

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Another common error is to simply move the old life to a new destination, which can also be problematic, she says.

CNN: Taking a step into the slow lane

Another common example might involve an application for regulatory permission to market a new pharmaceutical, where there is an arguable error or even falsehood, but where the officer has no actual knowledge of the error or falsehood.

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