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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. [1] It is not required for a valid argument to have premises that are actually true, [2] but to have premises that, if they were ...
Valedictorian. Valedictorian (VD) is an academic title for the highest-performing student of a graduating class of an academic institution. The valedictorian is generally determined by an academic institution's grade point average (GPA) system but other methods of selection may be factored in such as volunteer work, scholastic awards, research ...
Validity (statistics) Validity is the main extent to which a concept, conclusion, or measurement is well-founded and likely corresponds accurately to the real world. [1][2] The word "valid" is derived from the Latin validus, meaning strong. The validity of a measurement tool (for example, a test in education) is the degree to which the tool ...
In propositional logic, modus ponens (/ ˈmoʊdəs ˈpoʊnɛnz /; MP), also known as modus ponendo ponens (from Latin 'method of putting by placing'), [1] implication elimination, or affirming the antecedent, [2] is a deductive argument form and rule of inference. [3] It can be summarized as " P implies Q. P is true. Therefore, Q must also be ...
Transformation rules. In classical logic, a hypothetical syllogism is a valid argument form, a deductive syllogism with a conditional statement for one or both of its premises. Ancient references point to the works of Theophrastus and Eudemus for the first investigation of this kind of syllogisms. [1][2]
Formal fallacy. In logic and philosophy, a formal fallacy[a] is a pattern of reasoning rendered invalid by a flaw in its logical structure that can neatly be expressed in a standard logic system, for example propositional logic. [2] It is defined as a deductive argument that is invalid. The argument itself could have true premises, but still ...
Argument. An argument is a series of sentences, statements, or propositions some of which are called premises and one is the conclusion. [1] The purpose of an argument is to give reasons for one's conclusion via justification, explanation, and/or persuasion. Arguments are intended to determine or show the degree of truth or acceptability of ...
Premise. A premise or premiss[a] is a proposition —a true or false declarative statement—used in an argument to prove the truth of another proposition called the conclusion. [1] Arguments consist of a set of premises and a conclusion. An argument is meaningful for its conclusion only when all of its premises are true.