# logic

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## log·ic

(lŏj′ĭk)
n.
1. The study of principles of reasoning, especially of the structure of propositions as distinguished from their content, and of method and validity in deductive reasoning.
2.
a. A system of reasoning: Aristotle's logic.
b. A mode of reasoning: By that logic, we should sell the company tomorrow.
c. The formal, guiding principles of a discipline, school, or science.
3. Valid reasoning: Your paper lacks the logic to prove your thesis.
4. The relationship between elements and between an element and the whole in a set of objects, individuals, principles, or events: There's a certain logic to the motion of rush-hour traffic.
5. Computers
a. The nonarithmetic operations performed by a computer, such as sorting, comparing, and matching, that involve yes-no decisions.
b. Computer circuitry.
c. Graphic representation of computer circuitry.

[Middle English, from Old French logique, from Latin logica, from Greek logikē (tekhnē), (art) of reasoning, logic, feminine of logikos, of reasoning, from logos, reason; see leg- in the Appendix of Indo-European roots.]

## logic

(ˈlɒdʒɪk)
n
1. (Logic) the branch of philosophy concerned with analysing the patterns of reasoning by which a conclusion is properly drawn from a set of premises, without reference to meaning or context. See also formal logic, deduction4, induction4
2. (Logic) any particular formal system in which are defined axioms and rules of inference. Compare formal system, formal language
3. the system and principles of reasoning used in a specific field of study
4. a particular method of argument or reasoning
5. force or effectiveness in argument or dispute
6. reasoned thought or argument, as distinguished from irrationality
7. the relationship and interdependence of a series of events, facts, etc
8. (Logic) chop logic to use excessively subtle or involved logic or argument
9. (Computer Science) electronics computing
a. the principles underlying the units in a computer system that perform arithmetical and logical operations. See also logic circuit
b. (as modifier): a logic element.
[C14: from Old French logique from Medieval Latin logica (neuter plural, treated in Medieval Latin as feminine singular), from Greek logikos concerning speech or reasoning]

## log•ic

(ˈlɒdʒ ɪk)

n.
1. the science that investigates the principles governing correct or reliable inference.
3. a particular method of reasoning or argumentation.
4. the system or principles of reasoning applicable to any branch of knowledge or study.
5. reason or sound judgment, as in utterances or actions.
6. the consistency to be discerned in a work of art, system, etc.
7. any connection between facts that seems reasonable or inevitable.
8.
a. the arrangement of circuitry in a computer.
b. a circuit or circuits designed to perform functions defined in terms of mathematical logic.
[1325–75; Middle English logik < Latin logica, n. use of neuter pl. of Greek logikós of speech or reason. See logos, -ic]

## log·ic

(lŏj′ĭk)
The study of the principles of reasoning.

## Logic

the process of reasoning from effect to cause, based upon observation.
1. the method of a priori reasoning, i.e., deductive reasoning, from cause to effect or from the general to the particular.
2. an a priori principle.
a mnemonic word to represent a syllogistic argument in the first figure, in which there are two universal affirmative premises and a universal affirmative conclusion.
a mnemonic word to represent a syllogistic argument in the fourth figure, in which there are two universal affirmative premises and a particular affirmative conclusion.
a mnemonic word to represent a syllogistic argument in the second figure, in which there is one universal affirmative and one particular negative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the third figure, in which there is one particular negative and one universal affirmative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the second figure, in which there is one universal affirmative and one universal negative premise and a universal negative conclusion.
a mnemonic word to represent a syllogistic argument in the first figure, in which there is one universal negative and one universal affirmative premise and a universal negative conclusion.
a mnemonic word to represent a syllogistic argument in the second figure, in which there is one universal negative and one universal affirmative premise and a universal negative conclusion.
a mnemonic word to represent a syllogistic argument in the third figure, in which there are two universal affirmative premises and a particular affirmative conclusion.
a mnemonic word to represent a syllogistic argument in the first figure, in which there is one universal affirmative and one particular affirmative premise and a particular affirmative conclusion.
a mnemonic word to represent a syllogistic argument in the third figure, in which there is one universal affirmative and one particular affirmative premise and a particular affirmative conclusion.
1. an expression that has to be defined in terms of a previously defined expression.
2. anything that has to be defined. — definienda, n., pl.
Dimatis.
a mnemonic word to represent a syllogistic argument in the fourth figure, in which there is one universal affirmative and one affirmative premise and a particular affirmative conclusion. Also called Dimaris.
a mnemonic word to represent a syllogistic argument in the third figure, in which there is one particular affirmative and one universal affirmative premise and a particular affirmative conclusion.
a syllogistic argument that refutes a proposition by proving the direct opposite of its conclusion. — elenchic, elenctic, adj.
a syllogism in which the truth of one of the premises is confirmed by an annexed proposition (prosyllogism), thus resulting in the formation of a compound argument. See also prosyllogism.
equality between two or more propositions, as when two propositions have the same meaning but are expressed differently. See also agreement.
a mnemonic word to represent a syllogistic argument in the third figure, in which there is one universal negative and one universal affirmative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the first figure, in which there is one universal negative and one particular affirmative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the third figure, in which there is one universal negative and one particular affirmative premise and a particular negative conclusion. Also Ferison.
Feriso.
a mnemonic word to represent a syllogistic argument in the fourth figure, in which there is one universal negative and one universal affirmative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the second figure, in which there is one universal negative and one particular affirmative premise and a particular negative conclusion.
a mnemonic word to represent a syllogistic argument in the fourth figure, in which there is one universal negative and one particular affirmative premise and a particular negative conclusion.
the metaphysics or metaphysical aspects of logic. — metalogical, adj.
a division of logic devoted to the application of reasoning to science and philosophy. See also classification; order and disorder. — methodological, adj.
a multiple dilemma or one with many equally unacceptable alternatives; a difficult predicament.
a syllogism connected with another in such a way that the conclusion of the first is the premise of the one following.
the form or character of a syllogism.
an elliptical series of syllogism, in which the premises are so arranged that the predicate of the first is the subject of the next, continuing thus until the subject of the first is united with the predicate of the last. — soritical, soritic, adj.
a form of reasoning in which two propositions or premises are stated and a logical conclusion is drawn from them. Each premise has the subject-predicate form, and each shares a common element called the middle term.
the principles or practice of synthesis or synthetic methods or techniques, i.e., the process of deductive reasoning, as from cause to effect, from the simple elements to the complex whole, etc.
ThesaurusAntonymsRelated WordsSynonymsLegend:

## logic

noun
1. science of reasoning, deduction, dialectics, argumentation, ratiocination, syllogistic reasoning Students learn philosophy and logic.
3. reason, reasoning, sense, good reason, good sense, sound judgment The plan was based on sound commercial logic.

## logic

noun
1. Exact, valid, and rational reasoning:
2. What is sound or reasonable:
Idiom: rhyme or reason.
Translations
عِلْم المَنْطِق
logika
logik
logiikka
logika
logika
rökfræîi; rökrétt hugsun
loģika
logică
logika
logik

## logic

[ˈlɒdʒɪk]
A. N
I can't see the logic of itno le veo la lógica
B. CPD logic circuit N (Comput) →

## logic

[ˈlɒdʒɪk] n
the laws of logic → les lois de la logique

## logic

nLogik f; there’s no logic in thatdas ist völlig unlogisch

## logic

:
logic analyzer
n (Comput) → Logikanalysator m
logic bomb
n (Comput) → Langzeitvirus m, → Virus-Zeitbombe f

## logic

[ˈlɒdʒɪk] nlogica

## logic

(ˈlodʒik) noun
(the study and art of) reasoning correctly.
(thinking or acting) according to the rules of logic. It is logical to assume that you will get a higher salary if you are promoted; She is always logical in her thinking.