- In logic, validity is the property of an argument consisting in the fact that the truth of the premises logically guarantees the truth of the conclusion1. 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 false2.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/validityIn 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.
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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 per se. Validity refers to entire arguments. The same is true in propositional logic (statements can be true or false but not called valid … 展开
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 … 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
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
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 2 What is Logical Validity? - Oxford Academic
网页This chapter explores the meaning and role of logical validity in different logics, and argues that it cannot be explained by model theory or proof theory. It proposes a conceptual …
Validity and Soundness - Internet Encyclopedia of Philosophy
网页Learn the definitions and examples of valid and sound deductive arguments, and how to distinguish them from invalid and unsound ones. Explore the role of logical form, truth, …
Validity, Logical - SpringerLink
- Argument: 1. 1. If parents provide sensitive care for their young children and the learning environment is stimulating, then the well-being of the children will be good. 2. 2. If a stimulating environment leads to good well-being in young children, then they will do well in school. 3. 3. Parents are providing sensitive care for their children. Ther...
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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 …
内容效度 - 维基百科，自由的百科全书
网页2021年10月8日 · 在 心理统计学 领域中， 内容效度 、 逻辑效度 （英语： content validity、logical validity）指的是某个测量值多大的代表一个物体的所有子部分。. 譬如说，一个 忧郁 量表如果只评估 情感 面向的忧郁程度而没有考虑到 行为 面向的话，则这个忧郁量表可能缺乏 …
Logical Consequence - Stanford Encyclopedia of Philosophy
网页2005年1月7日 · The model-centered approach to logical consequence takes the validity of an argument to be absence of counterexample. A counterexample to an argument is, in …
Introduction to Logic - Chapter 3 - Stanford University
网页We begin this chapter with a look at logical properties of individual sentences (as opposed to relationships among sentences) - validity, contingency, and unsatisfiability. We then …
网页Learn what logical validity means in deductive and inductive arguments, and how to evaluate them using propositional calculus. See examples of modus ponens, …
网页A common understanding of logic is that, centrally, it is about validity. A recent proponent of this view is Graham Priest (2016: 8). Ole Thomassen Hjortland defends a similar view: …
