logic 音标拼音: [l'ɑdʒɪk]
n .
U 逻辑,逻辑学;逻辑性,条理性;推理;必然的联系
U 逻辑,逻辑学;逻辑性,条理性;推理;必然的联系
logic 逻辑
logic "或非"逻辑
logic 逻辑
logic n 1 :
the branch of philosophy that analyzes inference 2 :
reasoned and reasonable judgment ; "
it made a certain kind of logic "
3 :
the principles that guide reasoning within a given field or situation ; "
economic logic requires it "; "
by the logic of war "
4 :
the system of operations performed by a computer that underlies the machine '
s representation of logical operations 5 :
a system of reasoning [
synonym : {
logic }, {
logical system },
{
system of logic }]
Logic \
Log "
ic \,
n . [
OE .
logike ,
F .
logique ,
L .
logica ,
logice ,
Gr .
logikh ` (
sc .
te `
chnh ),
fr .
logiko `
s belonging to speaking or reason ,
fr .
lo `
gos speech ,
reason ,
le `
gein to say ,
speak .
See {
Legend }.]
1 .
The science or art of exact reasoning ,
or of pure and formal thought ,
or of the laws according to which the processes of pure thinking should be conducted ;
the science of the formation and application of general notions ;
the science of generalization ,
judgment ,
classification ,
reasoning ,
and systematic arrangement ;
the science of correct reasoning .
[
1913 Webster ]
Logic is the science of the laws of thought ,
as thought ;
that is ,
of the necessary conditions to which thought ,
considered in itself ,
is subject .
--
Sir W .
Hamilton .
[
1913 Webster ]
Note :
Logic is distinguished as pure and applied . "
Pure logic is a science of the form ,
or of the formal laws ,
of thinking ,
and not of the matter .
Applied logic teaches the application of the forms of thinking to those objects about which men do think ." --
Abp .
Thomson .
[
1913 Webster ]
2 .
A treatise on logic ;
as ,
Mill '
s Logic .
[
1913 Webster ]
3 .
correct reasoning ;
as ,
I can '
t see any logic in his argument ;
also ,
sound judgment ;
as ,
the logic of surrender was uncontestable .
[
PJC ]
4 .
The path of reasoning used in any specific argument ;
as ,
his logic was irrefutable .
[
PJC ]
5 . (
Electronics ,
Computers )
A function of an electrical circuit (
called a gate )
that mimics certain elementary binary logical operations on electrical signals ,
such as AND ,
OR ,
or NOT ;
as ,
a logic circuit ;
the arithmetic and logic unit .
[
PJC ]
72 Moby Thesaurus words for "
logic ":
Aristotelian logic ,
Boolean algebra ,
Ramistic logic ,
admissibility ,
aesthetics ,
algebra of classes ,
algebra of relations ,
axiology ,
casuistry ,
common sense ,
cosmology ,
deduction ,
dialectic ,
dialectics ,
doctrine of inference ,
doctrine of terms ,
epistemological logic ,
epistemology ,
ethics ,
experimental logic ,
first philosophy ,
formal logic ,
gnosiology ,
good sense ,
intelligence ,
judiciousness ,
justifiability ,
justness ,
logicality ,
logicalness ,
logics ,
logistic ,
material logic ,
mathematical logic ,
mental philosophy ,
metaphysics ,
moral philosophy ,
ontology ,
phenomenology ,
philosophastry ,
philosophic doctrine ,
philosophic system ,
philosophic theory ,
philosophical inquiry ,
philosophical speculation ,
philosophy ,
plausibility ,
practicality ,
presence of mind ,
propositional calculus ,
psychological logic ,
psychologism ,
ratiocination ,
rationality ,
reason ,
reasonability ,
reasonableness ,
reasoning ,
school of philosophy ,
school of thought ,
science of being ,
sense ,
sensibleness ,
set theory ,
sophistry ,
sound sense ,
soundness ,
sweet reason ,
theory of beauty ,
theory of knowledge ,
value theory ,
wisdom 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 {meta -language } concerned with truth ,
which may or may not have a corresponding expression in the
world of objects called existance . In symbolic logic ,
arguments and {proofs } are made in terms of symbols
representing {propositions } and {logical connectives }. The
meanings of these begin with a set of rules or {primitives }
which are assumed to be self -evident . Fortunately , even from
vague primitives , functions can be defined with precise
meaning .
Boolean logic } deals with the basic operations of {truth
values }: AND , OR , NOT and combinations thereof . {Predicate
logic } extends this with {existential quantifiers } and
universal quantifiers } which introduce {bound variables }
ranging over {finite } sets ; the {predicate } itself takes on
only the values true and false . Deduction describes how we
may proceed from valid {premises } to valid conclusions , where
these are expressions in {predicate logic }.
Carnap used the phrase "rational reconstruction " to describe
the logical analysis of thought . Thus logic is less concerned
with how thought does proceed , which is considered the realm
of psychology , and more with how it should proceed to discover
truth . It is the touchstone of the results of thinking , but
neither its regulator nor a motive for its practice .
See also fuzzy logic , logic programming , arithmetic and logic unit ,
first -order logic ,
See also {Boolean logic }, {fuzzy logic }, {logic programming },
first -order logic }, {logic bomb }, {combinatory logic },
higher -order logic }, {intuitionistic logic }, {equational
logic }, {modal logic }, {linear logic }, {paradox }.
2 . {Boolean } logic circuits .
See also {arithmetic and logic unit }, {asynchronous logic },
TTL }.
1995 -03 -17 )
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