Prediction

Statement about a future event / From Wikipedia, the free encyclopedia

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A prediction (Latin præ-, "before," and dicere, "to say"), or forecast, is a statement about a future event or data. They are often, but not always, based upon experience or knowledge. There is no universal agreement about the exact difference from "estimation"; different authors and disciplines ascribe different connotations.

Old_Farmer%27s_Almanac_1793_cover.jpg
The Old Farmer's Almanac is famous in the US for its (not necessarily accurate) long-range weather predictions.

Future events are necessarily uncertain, so guaranteed accurate information about the future is impossible. Prediction can be useful to assist in making plans about possible developments.