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  2. Validity (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)
    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, because of the form of the argument.
    www.britannica.com/topic/validity
     
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    Validity (logic) - Wikipedia

    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 … See more

    In logic, an argument is a set of statements expressing the premises (whatever consists of empirical evidences and axiomatic truths) … See more

    A statement can be called valid, i.e. logical truth, if it is true in all interpretations. See more

    Model theory analyzes formulae with respect to particular classes of interpretation in suitable mathematical structures. On this reading, formula is valid if all such interpretations make it true. An inference is valid if all interpretations that validate the … See more

    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. See more

    Validity of deduction is not affected by the truth of the premise or the truth of the conclusion. The following deduction is perfectly valid: See more

    In truth-preserving validity, the interpretation under which all variables are assigned a truth value of 'true' produces a truth value of 'true'. See more

     
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  5. Validity | Reasoning, Argument, Evidence | Britannica

  6. Validity and Soundness - Internet Encyclopedia of Philosophy

  7. Introduction to Philosophy/Logic/Truth and Validity

  8. 2 What is Logical Validity? - Oxford Academic

  9. Validity and Soundness: Validity | Saylor Academy

  10. Truth, Validity, and Soundness - Lander University

  11. Logical Truth - Stanford Encyclopedia of Philosophy

  12. Validity, Logical - SpringerLink

  13. 1.7: Validity and Soundness - Humanities LibreTexts

  14. Chapter 1 – Revised Fundamental Methods of Logic

  15. 2.6 Validity – PPSC PHI 1011: The Philosopher's Quest - CCCOnline

  16. Validity and Soundness – A Brief Introduction to Philosophy

  17. Definition and Examples of Valid Arguments - ThoughtCo

  18. 4.4: Validity and Soundness - Humanities LibreTexts

  19. Modal Logic - Stanford Encyclopedia of Philosophy

  20. The Normative Status of Logic - Stanford Encyclopedia of …

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