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* Japanese: 成功報酬 (seikō-hōshū) [http://en.wiktionary.org/wiki/contingency]
* Japanese: 成功報酬 (seikō-hōshū) [http://en.wiktionary.org/wiki/contingency]
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<center>For lessons on the related [[topic]] of '''''[[Chance]]''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Chance '''''this link'''''].</center>
==Philosophy==
==Philosophy==
In [[philosophy]] and [[logic]], '''contingency''' is the [[status]] of [[facts]] that are not logically necessarily true or false. Contingency is opposed to [[necessity]]: a contingent [[act]] is an act which could have not been, an act which is not necessary (could not have not been). Contingency differs from [[possibility]], in a [[formal]] sense, as the latter includes statements which are necessarily true as well as not necessarily false, while a statement can not be said to be contingent if it is true necessarily.
In [[philosophy]] and [[logic]], '''contingency''' is the [[status]] of [[facts]] that are not logically necessarily true or false. Contingency is opposed to [[necessity]]: a contingent [[act]] is an act which could have not been, an act which is not necessary (could not have not been). Contingency differs from [[possibility]], in a [[formal]] sense, as the latter includes statements which are necessarily true as well as not necessarily false, while a statement can not be said to be contingent if it is true necessarily.
