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单词 Sufficient cause
释义

Sufficient cause

原声例句
猫鼠游戏 第1季

Only one they'd have sufficient cause to arrest is you.

他们唯一可抓的人就是你。

中文百科

充分必要条件 Necessity and sufficiency

(重定向自Sufficient cause)

充分及必要条件sufficient and necessary condition)简称「充要条件」。

在逻辑学中:

因此:

英语百科

Necessity and sufficiency 充分必要条件

(重定向自Sufficient cause)
The sun being above the horizon is a necessary condition for direct sunlight; but it is not a sufficient condition as something else may be casting a shadow, e.g. in the case of an eclipse.
That a train runs on schedule can be a sufficient condition for arriving on time (if one boards the train and it departs on time, then one will arrive on time); but it is not always a necessary condition, since there are other ways to travel (if the train does not run to time, one could still arrive on time through other means of transport).
Consider two logical statements S and N, such that S is sufficient for N (if S is true, then N must also be true). Figuratively, if we are within S then we are within N. It follows that S cannot be true unless N is true – i.e., that N is a necessary condition for S.
Dass ein Korb da ist, ist eine notwendige Bedingung, um Basketball spielen zu können – ohne ihn geht es nicht.

In logic, necessity and sufficiency are implicational relationships between statements. The assertion that one statement is a necessary and sufficient condition of another means that the former statement is true if and only if the latter is true. That is, the two statements must be either simultaneously true or simultaneously false. In ordinary English, 'necessary' and 'sufficient' indicate relations between conditions or states of affairs, not statements. Being a male sibling is a necessary and sufficient condition for being a brother. Fred's being a male sibling is necessary and sufficient for the truth of the statement that Fred is a brother.

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更新时间:2025/6/22 4:54:51