Precise and Accurate

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Precise and Accurate :

In ordinary usage, accurate and precise are often used as rough synonyms, but scientists like to distinguish between them. Someone could say that a snake is over a meter long and be accurate (the snake really does exceed one meter in length), but that is not a precise measurement.

To be precise, the measurement would have to be more exact: the snake is 1.23 meters long.

The same distinction applies in scientific contexts to the related words accuracy and precision.

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