- Validity is a property of an argument in logic123. It refers to whether or not the conclusion follows logically from the premises, i.e., whether it is possible to deduce the conclusion from the premises and the allowable syllogisms of the logical system being used2. If it is possible to do so, the argument is said to be valid; otherwise it is invalid23. An argument is valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false3.了解详细信息：✕以上信息汇总借助人工智能技术，若访问原文请查看了解详细信息。
validity, In logic, the property of an argument consisting in the fact that the truth of the premises logically guarantees the truth of the conclusion. Whenever the premises are true, the conclusion must be true,...
www.britannica.com/topic/validityThe validity of a logical argument refers to whether or not the conclusion follows logically from the premises, i.e., whether it is possible to deduce the conclusion from the premises and the allowable syllogisms of...
mathworld.wolfram.com/Validity.htmlValidity (logic) In logic, specifically in deductive reasoning, an argument is valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false.en.wikipedia.org/wiki/Validity_(logic) - 其他用户还问了以下问题
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In logic, specifically in deductive reasoning, an argument is valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. It is not required for a valid argument to have premises that are actually true, but to have premises that, if they were … 展开
A statement can be called valid, i.e. logical truth, in some systems of logic like in Modal logic if the statement is true in all interpretations. In Aristotelian logic statements are not valid … 展开
In truth-preserving validity, the interpretation under which all variables are assigned a truth value of 'true' produces a truth value of 'true'. 展开
A formula of a formal language is a valid formula if and only if it is true under every possible interpretation of the language. In propositional logic, they are tautologies. 展开
Validity of deduction is not affected by the truth of the premise or the truth of the conclusion. The following deduction is perfectly valid: 展开
Model theory analyzes formulae with respect to particular classes of interpretation in suitable mathematical structures. On this reading, a formula is valid if all such interpretations make it true. An inference is valid if all interpretations that validate the … 展开
CC-BY-SA 许可证中的维基百科文本 Validity | Reasoning, Argument, Evidence | Britannica
网页validity, In logic, the property of an argument consisting in the fact that the truth of the premises logically guarantees the truth of the conclusion. Whenever the premises are …
逻辑学：从入门到入土（一）——介绍 - 知乎 - 知乎专栏
- 搜有效论证，喂鸡只有“有效性”这个条目，其它网站上也没搜到“有效论证”这个词。事实上没搜 …
Valid arguments认为，如果一个论证不能从真前提中得出假结论，则论证的形式完全有效。其中“Valid arguments”的“valid（有效）”的意思并不是前提是对的，而指且仅指结论由前提产生。 - 在上面举的“睡过头”的例子里，它的逻辑构成（form）是类似if-then的逻辑概念和“睡过头了”这样 …
•If A then B
- 搜有效论证，喂鸡只有“有效性”这个条目，其它网站上也没搜到“有效论证”这个词。事实上没搜 …
Validity and Soundness - Internet Encyclopedia of Philosophy
网页Validity and Soundness. A deductive argument is said to be valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless …
Definition and Examples of Valid Arguments - ThoughtCo
网页2020年6月22日 · In a deductive argument, validity is the principle that if all the premises are true, the conclusion must also be true. Also known as formal validity and valid argument. In logic, validity isn't the same as …
Introduction to Philosophy/Logic/Truth and Validity
网页2023年12月27日 · In logic, truth is a property of statements, i.e. premises and conclusions, whereas validity is a property of the argument itself. If you talk of 'valid premises' or 'true …
Validity, Logical - SpringerLink
网页Logical validity refers to the evaluation of the soundness of an argument (i.e., how well it preserves the truth) (Michalos, 2006). Description An argument consists of a series of …
Classical Logic - Stanford Encyclopedia of Philosophy
网页2000年9月16日 · Some philosophers and logicians have maintained that there is a single logical system that is uniquely correct, in its role of characterizing validity. Among …
3.2.3: Validity in Predicate Logic - Humanities LibreTexts
网页A predicate logic argument is Valid if and only if it has no counterexamples. Let's illustrate the idea of counterexamples in examining the validity of Lae
Validity - logic.stanford.edu
网页A sentence is valid if and only if it is satisfied by every truth assignment. For example, the sentence ( p ∨ ¬ p ) is valid. A good method for determining the validity of a sentence is …
