Definition of logic in US English:

logic

noun

  • 1Reasoning conducted or assessed according to strict principles of validity.

    ‘experience is a better guide to this than deductive logic’
    ‘the logic of the argument is faulty’
    ‘he explains his move with simple logic’
    • ‘Whoever wishes to hold on to the distinction would need to maintain, according to his own logic, that he has always been there - a thesis which can all too easily be disproved.’
    • ‘And to take such a stance, outside of the accepted discourse of reason, means that he can't use deductive logic to defend it.’
    • ‘He also claimed that when classicists applied deductive logic to these inadequate axioms they inevitably got inadequate results.’
    • ‘Does anyone else see the faulty logic here?’
    • ‘These critics argue that the restriction upsets the logic we use to reason with such predictions.’
    • ‘In this case, one can see the possibility of two sets of logic at work.’
    • ‘You've really fallen if you're understanding his twisted logic, a little voice in her brain pointed out.’
    • ‘Only in retrospect can one discern some of the logic at work.’
    • ‘Thus it should be possible to use deductive logic to derive predictions from pseudoscientific hypotheses.’
    • ‘The logic of certain arguments requires that we entertain them up to a certain point.’
    • ‘I think he is attacking systematic philosophies and the idea of deductive logic.’
    • ‘Somehow, the unspoken logic goes, if we ignore it, it doesn't exist.’
    • ‘We also showed in our earlier studies that tobacco smuggling defies apparent economic logic.’
    • ‘No doubt he will be able to apply his twisted logic to it.’
    • ‘However, it is not the role of a studio to question the business logic of the client.’
    • ‘Once set in motion by the Creator they continued by their own inexorable internal logic.’
    • ‘Why, the logic goes, would we want independence when devolution is so bad?’
    • ‘That is the primary reason and logic behind media.’
    • ‘I am apologetic here, as I do not understand your faulty logic in the aforementioned statement.’
    • ‘Allow me to follow the logic of your argument and see where this strategy would lead.’
    science of reasoning, science of deduction, science of thought, dialectics, argumentation, ratiocination
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    1. 1.1 A particular system or codification of the principles of proof and inference.
      ‘Aristotelian logic’
      • ‘This work stems from work that Frege did with predicate logic and mathematics.’
      • ‘Frege's primary concern was to construct a system of logic, formulated in an idealized language, which was adequate for mathematical reasoning.’
      • ‘Fuzzy logic is used for controlling a wide variety of devices.’
      • ‘Process monitoring is performed by a controller that uses fuzzy logic and neural network technology.’
      • ‘People have mental representations similar to sentences in predicate logic.’
      • ‘What is wanted is first to develop a system of Aryan logic different from non-Aryan logic.’
      • ‘After all, what is so sacrosanct about first-order predicate logic in its standard form?’
      • ‘Philosophers trained in modern logic may accordingly feel that there is something either obscure or else superficial in the notion of irreducibly tensed predication.’
      • ‘The ‘internal’ logic of smooth infinitesimal analysis is accordingly not full classical logic.’
      • ‘There is one context in which the language of possible worlds is undoubtedly useful and even illuminating, namely, in the study of formal axiomatic systems of modal logic.’
      • ‘Given that we are quoting Godel, I assumed that we were sticking to standard binary logic systems.’
      • ‘Formal logic is applied again, this time to determine whether a premature or erroneous idea prevails.’
    2. 1.2 The systematic use of symbolic and mathematical techniques to determine the forms of valid deductive argument.
      • ‘In formal mathematical logic, one makes frequent use of the existential and universal quantifiers.’
      • ‘That fall, the process of smoothing out and filling in the technical details of Wiles's celebrated result turned up a troublesome gap in the proof's logic.’
    3. 1.3 The quality of being justifiable by reason.
      ‘there's no logic in telling her not to hit people when that's what you're doing’
      • ‘The position is SO lacking in logic it makes me think that the unions have sold out just like our politicians.’
      • ‘Reason, logic, and common sense are practically a foreign language to this girl!’
      • ‘I know, I know, I've written about it before, but the lack of logic irritates me to no end.’
      • ‘This production returns coherence, logic, and sanity to a masterpiece.’
      • ‘There's no logic to it, only a contagion of inferences.’
      • ‘With opinions and arguments completely lacking in evidence, logic or relevance, this stuff is irresistible.’
      • ‘The lack of logic is not the only, nor the most important, finger pointed at the movie.’
      • ‘I remember being infuriated by the injustice and lack of logic.’
      • ‘That lacks logic, since the gap may have been larger a decade ago.’
      • ‘At the heart of the process is a mysterious lack of logic.’
      • ‘The worriers are increasingly getting tangled in their own lack of logic.’
      • ‘Even some of the proposed remedies lack any real logic, including the decision to close the staff final salary pension scheme only to new entrants.’
      • ‘You may disagree with them on the merits, but this disagreement turns on differences in moral axioms, not the other side's lack of logic.’
      • ‘There is a lack of logic in certain passages which reveals a sense of scepticism towards determination.’
      • ‘She was beginning to laugh a little, being painfully aware of the apparent lack of logic.’
      • ‘There is no inexorable logic dictating that the media must undermine the independence of the spheres of art and culture.’
      • ‘In my opinion they represent an end in themselves and a complete lack of professional logic.’
      • ‘There is precisely no logic to his reasoning at all.’
      • ‘‘It illustrates the lack of logic that exists in current US law,’ he said.’
      • ‘Marked from the outset by frivolity, it also lacks substance and logic.’
      reason, judgement, logical thought, rationality, cognition, wisdom, sagacity, sound judgement, sense, good sense, common sense, rationale, sanity
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    4. 1.4logic of The course of action or line of reasoning suggested or made necessary by.
      ‘if the logic of capital is allowed to determine events’
      • ‘Following the logic of postmodern criticism, we could assume a level of ironic distance.’
      • ‘Ending world poverty means rejecting the logic of capitalism that puts profit before human need.’
      • ‘The truly religious, following the logic of submission to political and moral ideals, and to the arbitrary will of God, are terrifying to us and almost incomprehensible.’
      • ‘We no longer follow the logic of one size fits all, like earlier.’
      • ‘They have also become consumer goods in themselves, which follow the logic of market.’
      • ‘There was now to be no sanctuary where the logic of capitalism could not prevail.’
      • ‘In Scotland, by contrast, there remain few incentives for doctors or GPs to follow the logic of the market.’
      reasoning, line of reasoning, chain of reasoning, process of reasoning, argument, argumentation
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  • 2A system or set of principles underlying the arrangements of elements in a computer or electronic device so as to perform a specified task.

    • ‘One way logic is different from software is that it's inherently parallel.’
    • ‘The computer program code logic is executed by the processing circuitry and is configured to generate an output signal.’
    • ‘He is a member of the PRL project there, which studies computer supported logic and computational type theory.’
    • ‘The application server instructs the softswitch on how to complete the call according to the rules of the relevant service logic.’
    • ‘In FireStarter's gameplay, we put a stake on worked-out balance and logic instead of scripted elements.’
    • ‘Knowing algorithms, which is really the underlying piece of any logic in a computer program, is an extremely important skill for programmers.’
    • ‘Of course, CPUs, memory, core logic and motherboards have evolved substantially over the years.’
    • ‘The program's underlying logic is also now reflected in an orderly and commonsense interface which reflects this awesome program's true power.’
    • ‘The second wave is syntactic: attacks against the operating logic of computers and networks.’
    • ‘Mac hardware today differs from PCs solely in the CPU, system logic and the motherboard they sit on.’
    • ‘Those systems range from the simple database used to collect data to the most complex systems that utilize computer logic and improve efficiency.’
    • ‘As far as we can see, the patent doesn't explicitly refer to Flash, but it does refer to NAND gate logic, a key component of Flash memory.’
    • ‘This general approach has provided a well-engineered partitioning of the required computations across fixed and programmable logic.’
    • ‘A circuit embodying the present invention includes sample logic, arithmetic logic and cancellation logic.’
    1. 2.1 Logical operations collectively.
      • ‘Although the number of optimisations that the mapper carries out are limited, it can cluster logic in cells to improve overall usage and perform some power minimisation.’
      • ‘To use them, however, we need to implement them in physical reality so that the gates can perform their logic actively.’
      • ‘Another capability is that the software uses logic based on available memory to break up large models.’
      • ‘USB OTG adds a small amount of additional logic, however, which allows a device to serve either as a host or peripheral.’
      • ‘If performance parity is achieved, then moving to new core logic and memory is a non-issue, and it's easy to justify adopting those other neat new features.’
      • ‘In such a PDA, DRAM cells normally are refreshed periodically by the memory controller logic present inside the CPU.’
      • ‘Unbuffered memory refers to memory modules that do not have buffer or register logic built in.’

Origin

Late Middle English: via Old French logique and late Latin logica from Greek logikē (tekhnē) ‘(art) of reason’, from logos ‘word, reason’.

Pronunciation

logic

/ˈläjik//ˈlɑdʒɪk/