A form of the reductio ad absurdum argument, known as indirect proof or reductio ad impossibile, is one that proves a proposition by showing that its denial conjoined with other propositions previously proved or accepted leads to a contradiction.
dictionary.reference.com/browse/reductio+ad+absurdum dictionary.reference.com/browse/reductio+ad+absurdum
Anselm argues, in effect, that the existence of God is built into the very concept of God. He proceeds by a form of argument called reductio ad absurdum ...
stairs.umd.edu/236/anselm.html stairs.umd.edu/236/anselm.html
• To deny this is self-contradictory; – It would be like saying: "Triangles have three sides by definition, but there is a triangle with only two sides"; The form of the argument; • Note that Anselm's argument is a reductio ad absurdum;
stairs.umd.edu/236/The_Ontological_Argument.pdf
Anselm now employs a form of reasoning called reductio ad absurdum. This is a very useful technique. In a proof of this sort, we begin by assuming the opposite of what we want to prove. Then we derive a contradiction or an absurdity from this supposition.
www.princeton.edu/~grosen/puc/phi203/ontological.html
St. Anselm's argument takes the form of a reductio ad absurdum argument. Reductio ad absurdum is a Latin phrase literally meaning, "reduction to absurdity". In this kind of deductive argument you suppose the opposite of what you set out to prove. ... Reductio ad absurdum is the theory Anselm uses in premise (2).
www.cheathouse.com/essay/essay_view.php?p_essay_id=8353... www.cheathouse.com/essay/essay_view.php?p_essay_id=83535
The argument has the form of a reductio ad absurdum, which means that it takes a hypothesis, shows that it has absurd or otherwise unacceptable implications, and so concludes that the hypothesis is false. ... If God is that than which no greater can be conceived, Anselm argues, then nothing can be imagined that is greater...
www.philosophyofreligion.info/theistic-proofs/the-ontol... www.philosophyofreligion.info/theistic-proofs/the-ontological-argument/st-anselms-ontological-argument/
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Prior to his development of what is considered the first reductio ad absurdum ontological argument, the existence of God had been debated on the basis of arguments that took in visible, material, empirical evidence to ... Anselm later creates a secondary version of his reduction ad absurdum proof of God’s existence.
web.ics.purdue.edu/~drkelly/ModelPaperOntological1.pdf
A selection of articles related to Reductio ad absurdum ... Anselm framed the argument as a reductio ad absurdum wherein he tried to show that the assumption that God does not exist leads to a logical contradiction. The following steps more closely follow Anselm's line of reasoning: 1) God is the entity t ...
www.experiencefestival.com/reductio_ad_absurdum www.experiencefestival.com/reductio_ad_absurdum
nec aliquid est in Socrate, præter illas formas informantes illam materiam ad faciendum Socratem, ... This is a reductio ad absurdum. It is clearly taught in Scripture and universally believed in the Church that the persons of the Trinity are one God in an infinitely higher sense than that in which all men are one man.
www.ccel.org/ccel/hodge/theology2.iii.ii.iii.html
In this paper I present a novel objection to ontological arguments. ... The argument concerns ontological arguments in general and has the general form of a reductio ad absurdum. Roughly, it rests on the fact that if a sound ontological argument were available, it would contradict the very nature of God.
cogprints.org/2850/