Absurdity

• 1. Introduction

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  Absurdity, in its earliest form, was not a philosophical concept but a musical one. The Latin word absurdum means "out of tune". From that acoustic root, the term drifted into language and thought, eventually coming to mean "out of harmony with reason". The Latin surdus, meaning "deaf", lurks inside it too, carrying an implication of stupidity.

  What began as a description of a wrong note became one of the most contested ideas in Western thought. Plato used it to demolish bad arguments. Thomas Hobbes catalogued seven distinct varieties of it. Albert Camus built an entire philosophy around it. And in American courtrooms today, judges invoke it to override the literal text of the law.

  How does a concept about being out of tune become a lens for examining everything from divine faith to the rules of logic to the silence at the center of the universe? That question runs through every corner of this story.

• 2. Ancient Roots

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  Plato used the word absurdity as a weapon. In his dialogues, it names the conclusion that follows when a thinker starts from a false premise. In Parmenides, he described himself as refusing to deploy absurd argumentation against his opponents; in Gorgias, he called the outcome of reasoning from a false assumption an "inevitable absurdity".

  Aristotle approached the problem from a different angle. He argued that once something irrational has been introduced into a narrative and made to seem plausible, readers must accept it in spite of the absurdity. He pointed to poetry as a shelter for weak reasoning, writing that "the absurdity is veiled by the poetic charm with which the poet invests it" and that in epic poetry "the absurdity passes unnoticed".

  In his book Rhetoric, Aristotle went further. He argued that a man being unable to persuade someone through words is itself absurd. Any unnecessary information in a speech blurs the argument and makes it unpersuasive, tipping it toward absurdity.

  Outside philosophy proper, absurdity carried a looser charge. In the playwright Aristophanes' 5th-century BC comedy The Wasps, the protagonist Philocleon learned the "absurdities" of Aesop's Fables, which the play treats as unreasonable fantasy rather than guidance about the real world.

• 3. Hobbes and His Table

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  Thomas Hobbes drew a line that most people had not bothered to draw. Absurdity, in his view, was not simply an error. It was a special kind of linguistic failure, one that only humans could commit because only humans have language. And Hobbes believed philosophers were more susceptible to it than anyone else.

  His analysis rested on the idea that absurd words are ones where "we conceive nothing but the sound". To speak of a "round quadrangle" or "immaterial substances" or a "free will" freed from all external constraint was not, he argued, to make a mistake. It was to say nothing at all.

  Hobbes codified this in what scholars call "Hobbes' Table of Absurdity", drawn from his work De Corpore. He catalogued seven categories, each defined by an illegitimate combination of names. Combining the name of a body with the name of an accident produces statements like "existence is a being". Combining the name of a body with the name of a phantasm yields claims like "a ghost is a body". All seven categories drew their examples from the scholastic philosophy of his era, reflecting what the scholar Aloysius Martinich described as Hobbes' commitment to the new science of Galileo and Harvey.

  The analytic philosopher Gilbert Ryle would later address many of the same problems under a different label. Martinich noted that what Hobbes called absurdity, Ryle discussed as "category error". The concept survived the change in terminology.

• 4. Faith, Doubt, and the Irrational

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  "I believe because it is absurd." That phrase, known in Latin as Credo quia absurdum, is attributed to Tertullian and comes from his text De Carne Christi, in the translation offered by the philosopher Voltaire. According to the New Advent Church, what Tertullian actually wrote was that "the Son of God died; it is by all means to be believed, because it is absurd".

  The statement became a touchstone for fideism, an epistemological theory holding that reason and faith may be hostile to each other, with faith capable of prevailing where reason cannot go.

  Michel de Montaigne, the father of the essay and a founder of modern skepticism, brought absurdity into a more everyday context. He argued that abridging a good book is an act of foolishness that produces absurdity, writing that "every abridgement of a good book is a foolish abridgement" and that absurdity is "not to be cured".

  Francis Bacon, an early champion of empiricism and the scientific method, offered a counter-intuitive defense: absurdity should not always be laughed at. Bold new hypotheses and bold ways of thinking often court absurdity, and he wrote that "if absurdity be the subject of laughter, doubt you but great boldness is seldom without some absurdity". Andrew Willet, by contrast, grouped absurdities alongside "flat contradictions to scripture" and "heresies".

• 5. The Absurd in Modern Philosophy

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  In the 20th century, absurdity acquired a sharper and more personal meaning. The philosopher and writer Albert Camus became most famously associated with absurdism after his death, and the idea he developed was not about logic but about experience. The absurd, in his framework, arises not from the universe alone or from the human mind alone, but from the collision of both: the human tendency to seek meaning encountering a universe that offers none with any certainty.

  Thomas Nagel examined this collision in his paper The Absurd. He argued that absurdity in human life becomes visible when a person realizes they take their own existence seriously while simultaneously seeing an arbitrariness in everything they do. His prescription was not to resolve the tension but to stay inside it. He urged readers never to stop searching for the absurd, and to look for irony within it.

  G. E. Moore, an English analytic philosopher, identified a different kind of absurdity: statements that are superficially absurd but not actually contradictory. His example was the sentence "I went to the pictures last Tuesday but I don't believe it". It can be true and logically consistent. Ludwig Wittgenstein extended this observation, noting that under unusual circumstances even "It is raining but I don't believe it" can make sense, and what looks like absurdity can dissolve on closer inspection.

  The pursuit of meaning despite certain death, and the accumulation of wealth against the backdrop of mortality, are among the concerns philosophers who contemplate the absurd have kept returning to.

• 6. Art, Theatre, and Nonsense

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  Lewis Carroll was a logician. That fact matters for understanding why his poem "Jabberwocky", a work of nonsense verse, is not simply whimsy. Carroll parodied logic by inverting its methods and deploying illogic where logic would be expected. The poem appeared originally inside his absurdist novel Through the Looking-Glass, and What Alice Found There, published in 1872.

  Jorge Luis Borges, the Argentine novelist, used absurdity in his short stories to make pointed arguments rather than comic ones. Franz Kafka's The Metamorphosis occupies the same territory for some readers.

  The Theatre of the Absurd emerged after the Second World War as a distinct movement in the dramatic arts. Its characteristic subject was characters grappling with the meaninglessness of existence. One statement associated with the movement described theatre as needing to be "a bloody and inhuman spectacle designed to exercise the spectator's repressed criminal and erotic obsessions".

  Absurdist ideas also shaped movements including Dada, surrealism, and literary nonsense. Together these represented an artistic effort to use irrationality not as failure but as method, pressing absurdity into service as a way to reveal something about the world that rational discourse could not reach.

• 7. Law and the Scrivener's Error

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  American courts developed their own doctrine of absurdity. Under this doctrine, a judge may refuse to apply a law as written if the outcome would be so obviously wrong that, as one formulation puts it, "all mankind would, without hesitation, unite in rejecting the application".

  Two types of absurdity arise in legal contexts. The first is the scrivener's error, a simple clerical mistake such as a misspelled word that warrants straightforward textual correction. The second is evaluative absurdity, which arises when a provision is grammatically sound but "makes no substantive sense". A classic hypothetical example is a statute that accidentally requires the winning party rather than the losing party to pay the other side's legal fees.

  The doctrine carries a second limiting principle alongside its scope: the absurdity must be correctable by modifying the text in relatively simple ways, keeping the remedy close to textualism rather than sliding toward purposivism.

  The historical illustration that has anchored this doctrine comes from a reference to Pufendorf. The example concerns a law in Bologna that threatened severe punishment for anyone who drew blood in the streets. Courts held that a surgeon who opened the vein of a person who collapsed in the street in a fit was not covered by that provision. A second case, drawn from the statute of the 1st Edward II, held that a prisoner who escaped a burning prison did not commit felony by doing so, because "he is not to be hanged because he would not stay to be burnt".

• 8. Logic, Language, and Code

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  Reductio ad absurdum is a proof technique built around the very concept the word names. A proposition is assumed to be true, and reasoning from that assumption leads to a conclusion known to be false. Because the conclusion is false, the original assumption must have been false as well. Plato used this method to argue against philosophical positions he opposed, and it remains a standard tool in mathematics and formal logic.

  In formal logic, the concept has its own dedicated symbol. The absurdity constant, written as the upside-down T symbol and denoted by the symbol most logicians read as bottom, represents falsum: the elementary logical proposition of a constant "false". Several programming languages implement it directly.

  Patrick Suppes invoked an absurdity rule in his work Logic, Methodology and Philosophy of Science: Proceedings, giving the concept a named place in the formal apparatus of logic.

  An absurdity constraint also appears in the logic of model transformations, a sub-field within computer science. From a Greek stage comedian's protagonist learning the "absurdities" of Aesop's Fables to a symbol at the base of formal proof systems, the word that once meant "out of tune" has become embedded in the architecture of human reasoning itself.