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10 definitions found
From The Collaborative International Dictionary of English v.0.44 : [ gcide ]
Demonstration \Dem`on*stra"tion\, n. [L. demonstratio: cf. F.
d['e]monstration.]
1. The act of demonstrating; an exhibition; proof;
especially, proof beyond the possibility of doubt;
indubitable evidence, to the senses or reason.
[1913 Webster]
Those intervening ideas which serve to show the
agreement of any two others are called ``proofs;''
and where agreement or disagreement is by this means
plainly and clearly perceived, it is called
demonstration. --Locke.
[1913 Webster]
2. An expression, as of the feelings, by outward signs; a
manifestation; a show. See also sense 7 for a more
specific related meaning.
[1913 Webster +PJC]
Did your letters pierce the queen to any
demonstration of grief? --Shak.
[1913 Webster]
Loyal demonstrations toward the prince. --Prescott.
[1913 Webster]
3. (Anat.) The exhibition and explanation of a dissection or
other anatomical preparation.
[1913 Webster]
4. (Mil.) a decisive exhibition of force, or a movement
indicating an attack.
[1913 Webster]
5. (Logic) The act of proving by the syllogistic process, or
the proof itself.
[1913 Webster]
6. (Math.) A course of reasoning showing that a certain
result is a necessary consequence of assumed premises; --
these premises being definitions, axioms, and previously
established propositions.
[1913 Webster]
7. a public gathering of people to express some sentiment or
feelings by explicit means, such as picketing, parading,
carrying signs or shouting, usually in favor of or opposed
to some action of government or of a business.
[PJC]
8. the act of showing how a certain device, machine or
product operates, or how a procedure is performed; --
usually done for the purpose of inducing prospective
customers to buy a product; as, a demonstration of the
simple operation of a microwave oven.
[PJC]
Direct demonstration, or Positive demonstration, (Logic &
Math.), one in which the correct conclusion is the
immediate sequence of reasoning from axiomatic or
established premises; -- opposed to
Indirect demonstration, or Negative demonstration (called
also reductio ad absurdum), in which the correct
conclusion is an inference from the demonstration that any
other hypothesis must be incorrect.
[1913 Webster]
From Webster's Revised Unabridged Dictionary (1913) : [ web1913 ]
Demonstration \Dem`on*stra"tion\, n. [L. demonstratio: cf. F.
d['e]monstration.]
1. The act of demonstrating; an exhibition; proof;
especially, proof beyond the possibility of doubt;
indubitable evidence, to the senses or reason.
Those intervening ideas which serve to show the
agreement of any two others are called ``proofs;''
and where agreement or disagreement is by this means
plainly and clearly perceived, it is called
demonstration. --Locke.
2. An expression, as of the feelings, by outward signs; a
manifestation; a show.
Did your letters pierce the queen to any
demonstration of grief? --Shak.
Loyal demonstrations toward the prince. --Prescott.
3. (Anat.) The exhibition and explanation of a dissection or
other anatomical preparation.
4. (Mil.) a decisive exhibition of force, or a movement
indicating an attack.
5. (Logic) The act of proving by the syllogistic process, or
the proof itself.
6. (Math.) A course of reasoning showing that a certain
result is a necessary consequence of assumed premises; --
these premises being definitions, axioms, and previously
established propositions.
Direct, or Positive, demonstration (Logic & Math.), one
in which the correct conclusion is the immediate sequence
of reasoning from axiomatic or established premises; --
opposed to
Indirect, or Negative, demonstration (called also
reductio ad absurdum), in which the correct conclusion
is an inference from the demonstration that any other
hypothesis must be incorrect.
From WordNet (r) 2.0 : [ wn ]
reductio ad absurdum
n : (reduction to the absurd) a disproof by showing that the
consequences of the proposition are absurd; or a proff of
a proposition by showing that its negation leads to a
contradiction [syn: reductio]
From English Wiktionary: All languages (2023-07-27) : [ dictinfo.com:wikt-en-ALL-2023-07-27 ]
reductio ad absurdum
n.
(lb en mathematics logic) The method of disproving a statement by
assuming the statement is true and, with that assumption, arriving at a
blatant contradiction.
From English Wiktionary: English language only (2023-07-27) : [ dictinfo.com:wikt-en-en-2023-07-27 ]
reductio ad absurdum
n.
(lb en mathematics logic) The method of disproving a statement by
assuming the statement is true and, with that assumption, arriving at a
blatant contradiction.
From English Wiktionary: Western, Greek, and Slavonic languages only (2023-07-27) : [ dictinfo.com:wikt-en-Western_Greek_Slavonic-2023-07-27 ]
reductio ad absurdum
n.
(lb en mathematics logic) The method of disproving a statement by
assuming the statement is true and, with that assumption, arriving at a
blatant contradiction.
From English Wiktionary: Western languages only (2023-07-27) : [ dictinfo.com:wikt-en-Western-2023-07-27 ]
reductio ad absurdum
n.
(lb en mathematics logic) The method of disproving a statement by
assuming the statement is true and, with that assumption, arriving at a
blatant contradiction.
From Swedish Wiktionary: All languages (2023-07-27) : [ dictinfo.com:wikt-sv-ALL-2023-07-27 ]
reductio ad absurdum
n.
(tagg: logik) argumentationsform som går ut på att man genom en serie
slutledningar givet ett visst antagande kommer fram till en slutsats som
är orimlig, uppenbart falsk eller en logisk motsägelse
From Swedish Wiktionary: Swedish language only (2023-07-27) : [ dictinfo.com:wikt-sv-sv-2023-07-27 ]
reductio ad absurdum
n.
(tagg: logik) argumentationsform som går ut på att man genom en serie
slutledningar givet ett visst antagande kommer fram till en slutsats som
är orimlig, uppenbart falsk eller en logisk motsägelse
From français-latine FreeDict+WikDict dictionary ver. 2020.10.04 : [ freedict:fra-lat ]
reductio ad absurdum /ʁe.duk.sjo ad ab.suʁ.dum/
reductio ad absurdum
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