El término predicción puede referirse tanto a la «acción y al efecto de predecir» como a «las palabras que manifiestan aquello que se predice»; en este sentido, predecir algo es «anunciar por revelación, ciencia o conjetura algo que ha de suceder».

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A prediction (Latin præ-, "before," and dicere, "to say"), or forecast, is a statement about an uncertain event. It is often, but not always, based upon experience or knowledge. There is no universal agreement about the exact difference between the two terms; different authors and disciplines ascribe different connotations. Although guaranteed accurate information about the future is in many cases impossible, prediction can be useful to assist in making plans about possible developments; Howard H. Stevenson writes that prediction in business "... is at least two things: Important and hard."

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