Self-refuting ideas are ideas or statements whose falsehood is a logical consequence of the act or situation of holding them to be true. "Therefore" redirects here For the symbol see Therefore sign. Many ideas are accused by their detractors of being self-refuting, and such accusations are therefore almost always controversial, with defenders claiming that the idea is being misunderstood or that the argument is invalid. In Logic, an argument is a Set of one or more Declarative sentences (or "propositions") known as the Premises along For these reasons, none of the ideas below are unambiguously or incontrovertibly self-refuting.
The Epimenides paradox is an instance of a statement of the form "this statement is false". Such statements troubled philosophers, especially when there was a serious attempt to formalize the foundations of logic. Bertrand Russell developed his "Theory of Types" to formalize a set of rules which would prevent such statements (more formally Russell's paradox) being made in symbolic logic. Bertrand Arthur William Russell 3rd Earl Russell, OM, FRS (18 May 1872 – 2 February 1970 was a British Philosopher, Historian In Mathematics, Logic and Computer science, type theory is any of several Formal systems that can serve as alternatives to Naive set theory Part of the Foundations of mathematics, Russell's paradox (also known as Russell's antinomy) discovered by Bertrand Russell in 1901 showed that the [1] This work has led to the modern formulation of axiomatic set theory. While Russell's formalization didn't contain such paradoxes, Kurt Gödel showed that it must contain independent statements. Kurt Gödel (kʊɐ̯t ˈgøːdl̩ (April 28 1906 – January 14 1978 was an Austrian American Logician, Mathematician and Philosopher In Mathematical logic, a sentence &sigma is called independent of a given first-order theory T if T neither proves nor Any logical system that is rich enough to contain elementary arithmetic contains propositions whose interpretation is "this proposition is unprovable" (from within the logical system concerned), and hence no such system can be both complete and consistent. In formal logic, a formal system (also called a logical system, a logistic system, or simply a logic Formal systems in mathematics consist In Mathematical logic, a first-order theory is complete, if for every sentence φ in its language it contains either φ itself or its negation
Objectivists define the fallacy of the stolen concept which consists of the act of using a concept while ignoring, contradicting or denying the validity of the concepts on which it logically and genetically depends. Objectivism is a Philosophy developed by Ayn Rand in the 20th century that encompasses positions on Metaphysics, Epistemology, A claimed example of the stolen concept fallacy is anarchist Pierre-Joseph Proudhon's assertion, "All property is theft". Pierre-Joseph Proudhon (ˈpruːd ɒn in British English, dɔ̃ in French) ( 15 January 1809 – 19 January 1865) was Property is theft! ( French: La propriété c'est le vol!) is a slogan coined by French anarchist Pierre-Joseph Proudhon in his 1840 book
Others have said the slogan is not an instance of the stolen concept fallacy under Proudhon's intended meaning. Proudhon used the term "property" with reference to claimed ownership in land, factories, etc. He believed such claims were illegitimate, and thus a form of theft from the commons. [3] Proudhon explicitly states that the phrase "property is theft" is analogous to the phrase "slavery is murder". According to Proudhon, the slave, though biologically alive, is clearly in a sense "murdered". The "theft" in in his terminology does not refer to ownership anymore than the "murder" refers directly to physiological death, but rather both are meant as terms to represent a denial of specific rights. [3]
It can be argued that to assert determinism as a rational claim in a debate is doubly self-defeating. Determinism is the philosophical Proposition that every event including human cognition and behaviour decision and action is causally determined [4][5]
Both arguments can be countered, for instance:
It has been argued that extreme ethical egoism is self-defeating. Ethical egoism is the normative ethical position that Moral agents ought to do what is in their Self-interest. Faced with a situation of limited resources, egoists would consume as much of the resource as they could, making the overall situation worse for everybody. Egoists rejoin that if the situation becomes worse for everybody, that would include the egoist, so it is not in fact in their rational self-interest to take things to such extremes. [6]
The philosopher Mary Midgley claims the idea that "nothing exists except matter" is also self-refuting because if it were true neither it, nor any other idea, would exist, and similarly that an argument to that effect would be self-refuting because it would deny its own existence. Mary Midgley, née Scrutton (born September 13, 1919) is an English moral philosopher. [7]
Several other philosophers argue that Eliminative materialism is self-refuting[8][9][10]
However, other forms of materialism may escape this kind of argument because, rather than eliminating the mental, they seek to identify it with, or reduce it to, the material. Eliminative materialism (also called eliminativism) is a materialist position in the Philosophy of mind. Self-refuting ideas are ideas or statements whose falsehood is a Logical consequence of the act or situation of holding them to be true The Philosophy of materialism holds that the only thing that can be truly proven to exist is Matter, and is considered a form of Physicalism. MIND ( Moving In New Directions) (est 1975 is an alternative education high school in Montreal, Quebec, Canada. Type physicalism (also known as Type Identity Theory, Mind-Brain Identity Theory and Identity Theory of Mind) is a theory in Philosophy of mind Type physicalism (also known as Type Identity Theory, Mind-Brain Identity Theory and Identity Theory of Mind) is a theory in Philosophy of mind [11]. For instance, identity theorists such as J. J. C. Smart, Ullin Place and E. G. Boring claim that ideas exist materially as patterns of neural structure and activity. Physicalism is a philosophical position holding that everything which exists is no more extensive than its Physical properties; that is that there are no kinds of things other John Jamieson Carswell "Jack" Smart AC (born 1920 often referred to as J Ullin Place (1924 – 2000 was a British philosopher and psychologist Edwin Garrigues Boring ( October 23, 1886 - July 1, 1968) was an experimental psychologist who later became one of the first Historians The nervous system is a Network of specialized cells that communicate information about an animal's surroundings and itself [12][13]
The first notable self-refuting idea is the Epimenides paradox, a statement attributed to Epimenides, a Cretan philosopher, that "All Cretans are Liars". The Epimenides paradox is a problem in Logic. It is named after the Cretan Philosopher Epimenides of Knossos (alive circa 600 BC Interpreted (for the present purpose) as meaning "no Cretan ever speaks the truth" this cannot be true if uttered by a Cretan. For the purpose of creating a self-refuting statement, this paradox might be better stated as "I am lying. " This is because the first statement does not, if false, necessarily mean that the speaker is telling the truth (the third option being "some Cretans do not speak the truth"). The second statement has no third alternative -- the speaker's statement is either true or false.
This is a particularly contentious proposal: Alvin Plantinga argues in his Evolutionary argument against naturalism that the combination of Naturalism and Evolution is "in a certain interesting way self-defeating" because if it were true there would be insufficient grounds to believe that human cognitive faculties are reliable. Alvin Carl Plantinga (born 1932 is a contemporary American Philosopher known for his work in Epistemology, Metaphysics, and the Philosophy The Evolutionary argument against naturalism (sometimes abbreviated EAAN) is a Philosophical argument that Metaphysical naturalism when combined with contemporary [14] This argument has been supported[15] and criticised[16][17] by a variety of thinkers[18]
First-cause arguments are described as self-refuting. For example, the philosopher Theodore Schick suggests that an argument by Thomas Aquinas can be formulated in the following terms:
– and suggests that this is self-refuting because "if everything has a cause other than itself, then god must have a cause other than himself. But if god has a cause other than himself, he cannot be the first cause. So if the first premise is true, the conclusion must be false. "[19]
The Philosopher Anthony Kenny argues that the idea, "common to theists like Aquinas and Descartes and to an atheist like Russell" that "Rational belief [is] either self-evident or based directly or indirectly on what is evident" (which he termed "foundationalism" following Plantinga) is self-refuting on the basis that this idea is itself neither self-evident nor based directly or indirectly on what is evident and that the same applies to other formulations of such foundationalism. Sir Anthony John Patrick Kenny FBA (born 16 March 1931 in Liverpool) is an English Philosopher whose interests lie Bertrand Arthur William Russell 3rd Earl Russell, OM, FRS (18 May 1872 – 2 February 1970 was a British Philosopher, Historian Alvin Carl Plantinga (born 1932 is a contemporary American Philosopher known for his work in Epistemology, Metaphysics, and the Philosophy [20] However, the self-evident impossibility of infinite regress can be offered as a justification for foundationalism. In Epistemology (theory of knowledge a self-evident proposition is one that is known to be true by understanding its meaning without proof. The regress argument (also known as the diallelus) is a problem in Epistemology and in general a problem in any situation where a statement has to be justified [21] Following the identification of problems with "naive foundationalism", the term is now often used re-defined to focus on incorrigible beliefs (modern foundationalism), or basic beliefs (reformed foundationalism). In Philosophy, incorrigibility is a property of a philosophical proposition, which implies that it is necessarily true simply by virtue of being believed In Foundationalism, basic beliefs (also commonly called foundational beliefs) are the Axioms of a Belief system
Biologist PZ Myers, commenting on Richard Dawkins' book The God Delusion, has suggested that "postulating an immensely complicated being to explain the creation of an immensely complicated universe doesn't actually explain anything and is self-refuting. Paul Zachary "PZ" Myers (born March 9, 1957) is an American biology professor at the University of Minnesota Morris (UMM and Clinton Richard Dawkins, FRS, FRSL (born 26 March 1941 is a British ethologist, evolutionary biologist, and Popular science The God Delusion is a 2006 bestselling non-fiction book by British biologist Richard Dawkins, holder of the Charles Simonyi Chair for the Public Understanding "[22]
It is often asserted that relativism about truth must be applied to itself. Compare Moral relativism, Aesthetic relativism, Social constructionism, Cultural relativism, and Cognitive relativism. The meaning of the word truth extends from Honesty, Good faith, and Sincerity in general to agreement with Fact or Reality [23][24] The cruder form of the argument concludes that since the relativist is asserting relativism as an absolute truth, it leads to a contradiction. Relativists often rejoin that in fact relativism is only relatively true, leading to a subtler problem: the absolutist, the relativist's opponent, is perfectly entitled, by the relativist's own standards, to reject relativism. That is, the relativist's arguments can have no normative force over someone who has different basic beliefs. Normative has specialized meanings in several academic disciplines In Foundationalism, basic beliefs (also commonly called foundational beliefs) are the Axioms of a Belief system [25]
Skeptics claim "nothing can be known". Can that claim itself be known, or is it self-refuting?[26][27]One very old response to this problem is Academic skepticism:[28] an exception is made for the skeptics own claim. This leads to further debate about consistency and special pleading. Special pleading is a form of spurious argumentation where a position in a dispute introduces favorable details or excludes unfavorable details by alleging a need to apply additional considerations Another response is to accept that "nothing can be known" cannot itself be known, so that it is not known whether anything is knowable or not. This is Pyrrhonic skepticism. Pyrrho (ca 360 BC - ca 270 BC a Greek Philosopher of Classical antiquity, is credited as being the first Skeptic philosopher and the inspiration
The statement "no statements are true unless they can be proven scientifically", is claimed to be self-refuting insofar as it cannot be proven scientifically; the same goes for essentially similar views like "no statements are true unless they can be shown empirically to be true". [29] (This kind of issue was a serious problem for logical positivism). Logical positivism (later and more accurately called logical empiricism) is a school of philosophy that combines Empiricism, the idea that observational evidence is
On the face of it, a statement of solipsism is self-defeating, because a statement assumes another person to whom the statement is made. Solipsism ( Latin: solus, alone + ipse, self is the philosophical idea that "My mind is the only thing that I know exists (That is to say, an unexpressed private belief in solipsism is not self-refuting). The solipsist can adopt the rather surreal maneuver of claiming that their interlocutor is in fact a figment of their imagination, but since their interlocutor knows they are not, they are not going to be convinced![30]
Anthony Kenny also argues that utilitarianism is self-refuting on the grounds that either determinism is true or false. Sir Anthony John Patrick Kenny FBA (born 16 March 1931 in Liverpool) is an English Philosopher whose interests lie Utilitarianism is the idea that the moral worth of an action is solely determined by its contribution to overall Utility, that is its contribution to happiness If it is true, then we have no choice over our actions. But if it is false then the consequences of our actions are unpredictable, not least because they will depend on the actions of others whom we cannot predict[31] This would be refuted by the truth of compatibilism. For other uses of each of these words see Compatibility. Compatibilism is the belief that Free will and Determinism are
The statements "statements are meaningless unless they can be empirically verified" and "statements are meaningless unless they can be empirically falsified" are both claimed to be self-refuting on the basis that they can neither be empirically verified nor falsified[32]
The Tractatus Logico-Philosophicus is an unusual example of a self-refuting argument, in that Ludwig Wittgenstein explicitly admits to the issue at the end of the work:
"My propositions are elucidatory in this way: he who understands me finally recognizes them as senseless, when he has climbed out through them, on them, over them. Tractatus Logico-Philosophicus is the only book-length work published by Austrian Philosopher Ludwig Wittgenstein. (He must so to speak throw away the ladder, after he has climbed up on it)". (6. 54)