翻訳と辞書
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・ lock-in
・ locked and loaded
・ locked up
・ locus
・ loebner prize
・ log in
・ log off
・ log out
・ logarithmus dualis
・ logc
logic
・ logic bomb
・ logic design language
・ logic emulator
・ logic for computable functions
・ logic gate
・ logic programming
・ logic replacement technology
・ logic variable
・ logical


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logic : FOLDOC
logic
1. A branch of philosophy and mathematics that deals with the formal principles, methods and criteria of validity of inference, reasoning and knowledge.
Logic is concerned with what is true and how we can know whether something is true. This involves the formalisation of logical arguments and proofs in terms of symbols representing propositions and {logical connectives}. The meanings of these logical connectives are expressed by a set of rules which are assumed to be self-evident.
Boolean algebra deals with the basic operations of truth values: AND, OR, NOT and combinations thereof. Predicate logic extends this with existential and universal quantifiers and symbols standing for {predicates} which may depend on variables. The rules of natural deduction describe how we may proceed from valid premises to valid conclusions, where the premises and conclusions are expressions in predicate logic.
Symbolic logic uses a metal
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Symbolic logic uses a metal


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