Colorless green ideas sleep furiously

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Approximate X-bar representation of Colorless green ideas sleep furiously. See phrase structure rules. Syntax tree.svg
Approximate X-bar representation of Colorless green ideas sleep furiously. See phrase structure rules.

Colorless green ideas sleep furiously was composed by Noam Chomsky in his 1957 book Syntactic Structures as an example of a sentence that is grammatically well-formed, but semantically nonsensical. The sentence was originally used in his 1955 thesis The Logical Structure of Linguistic Theory and in his 1956 paper "Three Models for the Description of Language". [1] : 116  There is no obvious understandable meaning that can be derived from it, which demonstrates the distinction between syntax and semantics, and the idea that a syntactically well-formed sentence is not guaranteed to be semantically well-formed as well. As an example of a category mistake, it was intended to show the inadequacy of certain probabilistic models of grammar, and the need for more structured models.

Contents

Senseless but grammatical

Chomsky wrote in his 1957 book Syntactic Structures :

  1. Colorless green ideas sleep furiously.
  2. *Furiously sleep ideas green colorless. [lower-alpha 1]

It is fair to assume that neither sentence (1) nor (2) had ever previously occurred in an English discourse. Hence, in any statistical model that accounts for grammaticality, these sentences will be ruled out on identical grounds as equally "remote" from English. Yet (1), though nonsensical, is grammatical, while (2) is not grammatical. [2] [1]

Approximate representation of "Colorless green ideas sleep furiously". See Minimalist Program. Tree Diagram for Chomsky's Sentence.png
Approximate representation of "Colorless green ideas sleep furiously". See Minimalist Program.

Colorless green ideas – which functions as the subject of the sentence – is an anomalous string for at least two reasons:

Sleep furiously – which functions as the predicate of the sentence – is structurally well-formed; in other words, it is grammatical. However, the meaning that it expresses is peculiar, as the activity of sleeping is not generally taken to be something that can be done in a furious fashion. Nevertheless, sleep furiously is both grammatical and interpretable, though its interpretation is unusual.

Combining Colorless green ideas with sleep furiously creates a sentence that some believe to be nonsensical. On the one hand, an abstract noun like idea is taken to not have the ability to engage in an activity like sleeping. On the other hand, some think it possible for an idea to sleep. [3] [4]

Linguists account for the unusual nature of this sentence by distinguishing two types of selection: semantic selection (s-selection) and categorical selection (c-selection). Relative to s-selection, the sentence is semantically anomalous – senseless – for three reasons:

However, relative to c-selection, the sentence is structurally well-formed:

This leads to the conclusion that although meaningless, the structural integrity of this sentence is high.

Attempts at meaningful interpretations

Polysemy

The mechanism of polysemy – where a word has multiple meanings – can be used to create an interpretation for an otherwise non-sensical sentence. For example, the adjectives green and colorless both have figurative meanings. Green has a wide range of figurative meanings, including "immature", "pertaining to environmental consciousness", "newly formed", and "naive". And colorless can be interpreted as "nondescript". Likewise the verb sleep can have the figurative meaning of "being in dormant state", and the adverb furiously can have the figurative meaning "to do an action violently or quickly".

When these figurative meanings are taken into account the sentence Colorless green ideas sleep furiously can have legitimate meaning, with less oblique semantics, and so is compatible with the following interpretations:

  1. Colorless green ideas sleep furiously.= "Nondescript immature ideas have violent nightmares."
  2. Colorless green ideas sleep furiously.= "Naive ideas which have not yet attained their full scope can cause a mind to race even while it attempts to rest"
  3. Colorless green ideas sleep furiously.= "Suppressed envious ideas lie dormant, though the negative feelings intensify"

Chomsky's "colorless green" inspired written works, which all try to create meaning from the semantically meaningless utterance through added context. In 1958, linguist and anthropologist Dell Hymes presented his work to show that nonsense words can develop into something meaningful when in the right sequence. [5] [6]

Hued ideas mock the brain,
Notions of color not yet color,
Of pure, touchless, branching pallor
Of invading, essential Green

—  Dell Hymes, 1958

Russian-American linguist and literary theorist Roman Jakobson (1959) [7] interpreted "colorless green" as a pale green, and "sleep furiously" as the wildness of "a state-like sleep, as that of inertness, torpidity, numbness." Jakobson gave the example that if "[someone's] hatred never slept, why then, cannot someone's ideas fall into sleep?" John Hollander, an American poet and literary critic, argued that the sentence operates in a vacuum as it is without context. He went on to write a poem based on that idea, entitled Coiled Alizarine that was included in his book, The Night Mirror (1971). [8]

Curiously deep, the slumber of crimson thoughts:
While breathless, in stodgy viridian
Colorless green ideas sleep furiously.

—  John Hollander, 1971

Years later, Hollander contacted Chomsky about whether the color choice of 'green' was intentional; however, Chomsky denied any intentions or influences, especially the hypothesized influence from Andrew Marvell's lines from "The Garden" (1681).

"Annihilating all that's made / To a green thought in a green shade"

One of the first writers to have attempted to provide the sentence meaning through context is Chinese linguist Yuen Ren Chao (1997). [9] Chao's poem, entitled Making Sense Out of Nonsense: The Story of My Friend Whose "Colorless Green Ideas Sleep Furiously" (after Noam Chomsky) was published in 1971. This poem attempts to explain what "colorless green ideas" are and how they are able to "sleep furiously". Chao interprets "colorless" as plain, "green" as unripened, and "sleep furiously" as putting the ideas to rest; sleeping on them overnight whilst having internal conflict with these ideas. [10]

I have a friend who is always full of ideas, good ideas and bad ideas, fine ideas and crude ideas, old ideas and new ideas. Before putting his new ideas into practice, he usually sleeps over them to let them mature and ripen. However, when he is in a hurry, he sometimes puts his ideas into practice before they are quite ripe, in other words, while they are still green. Some of his green ideas are quite lively and colorful, but not always, some being quite plain and colorless. When he remembers that some of his colorless ideas are still too green to use, he will sleep over them, or let them sleep, as he puts it. But some of those ideas may be mutually conflicting and contradictory and when they sleep together in the same night they get into furious fights and turn the sleep into a nightmare. Thus my friend often complains that his colorless green ideas sleep furiously.

British linguist Angus McIntosh was unable to accept that Chomsky's utterance was entirely meaningless because to him, "colorless green ideas may well sleep furiously". As if to prove that the sentences are in fact meaningful, McIntosh wrote two poems influenced by Chomsky's utterance, one of which was entitled Nightmare I. [11]

Tortured my mind's eye at its small peephole
sees through the virid glass
the endless ghostly oscillographic stream
Furiously sleep ideas green colorless
Madly awake am I at my small window

—  Angus McIntosh, 1961

Stanford 1985 competition

In 1985, a literary competition was held at Stanford University in which the contestants were invited to make Chomsky's sentence meaningful using not more than 100 words of prose or 14 lines of verse. [12] An example entry from the competition, by C. M. Street, is:

It can only be the thought of verdure to come, which prompts us in the autumn to buy these dormant white lumps of vegetable matter covered by a brown papery skin, and lovingly to plant them and care for them. It is a marvel to me that under this cover they are labouring unseen at such a rate within to give us the sudden awesome beauty of spring flowering bulbs. While winter reigns the earth reposes but these colourless green ideas sleep furiously.

Experimental usage

Research has been done by implementing this into conversations on text. [13] Research led by Bruno Galantucci at Yeshiva University has implemented the meaningless sentence into real conversations to test reactions. [14] They ran 30 conversations with 1 male and 1 female slipping "colorless green ideas sleep furiously" eight minutes into the conversation during silence. After the conversation, the experimenters did a post-conversation questionnaire, mainly asking if they thought the conversation was unusual. Galantucci concluded that there was a trend of insensitivity to conversational coherence.

There are two general theories that were garnered from this experiment. The first theory is that people tend to ignore the inconsistency of speech to protect the quality of the conversation. In particular, face-to-face conversation has a 33.33% lower detection rate of nonsensical sentences than online messaging. The authors further explain how humans often disregard some contents of every conversation. The second theory the authors deduced is that effective communication may be subconsciously undermined when dealing with conversational coherence. These conclusions support the idea that phatic communication plays a key role in social life.

Statistical challenges

Since the 1950s, the field has used techniques more in line with Chomsky's approach. However, this all changed in the mid-1980s, when researchers started to experiment with statistical models, convincing over 90% of the researchers in the field to switch to statistical approaches. [15]

In 2000, Fernando Pereira of the University of Pennsylvania fitted a simple statistical Markov model to a body of newspaper text, and showed that under this model, Furiously sleep ideas green colorless is about 200,000 times less probable than Colorless green ideas sleep furiously. [16]

This statistical model defines a similarity metric, whereby sentences which are more like those within a corpus in certain respects are assigned higher values than sentences less alike. Pereira's model assigns an ungrammatical version of the same sentence a lower probability than the syntactically well-formed structure demonstrating that statistical models can identify variations in grammaticality with minimal linguistic assumptions. However, it is not clear that the model assigns every ungrammatical sentence a lower probability than every grammatical sentence. That is, colorless green ideas sleep furiously may still be statistically more "remote" from English than some ungrammatical sentences. To this, it may be argued that no current theory of grammar is capable of distinguishing all grammatical English sentences from ungrammatical ones. [17]

In other languages

The French syntactician Lucien Tesnière came up with the French language sentence "Le silence vertébral indispose la voile licite" ("The vertebral silence indisposes the licit sail").

In Russian schools of linguistics, the glokaya kuzdra example has similar characteristics.

In games

The game of exquisite corpse is a method for generating nonsense sentences. It was named after the first sentence generated in the game in 1925: Le cadavre exquis boira le vin nouveau (the exquisite corpse will drink the new wine).

In the popular game of "Mad Libs", a chosen player asks each other player to provide parts of speech without providing any contextual information (e.g., "Give me a proper noun", or "Give me an adjective"), and these words are inserted into pre-composed sentences with a correct grammatical structure, but in which certain words have been omitted. The humor of the game is in the generation of sentences which are grammatical but which are meaningless or have absurd or ambiguous meanings (such as 'loud sharks'). The game also tends to generate humorous double entendres.

In philosophy

There are likely earlier examples of such sentences, possibly from the philosophy of language literature, but not necessarily uncontroversial ones, given that the focus has been mostly on borderline cases. For example, followers of logical positivism hold that "metaphysical" (i.e. not empirically verifiable) statements are simply meaningless; e.g. Rudolf Carnap wrote an article in which he argued that almost every sentence from Heidegger was grammatically well-formed, yet meaningless. [18]

The philosopher Bertrand Russell used the sentence "Quadruplicity drinks procrastination" in his "An Inquiry into Meaning and Truth" from 1940, to make a similar point; [19] W.V. Quine took issue with him on the grounds that for a sentence to be false is nothing more than for it not to be true; and since quadruplicity does not drink anything, the sentence is simply false, not meaningless. [20]

Other arguably "meaningless" utterances are ones that make sense, are grammatical, but have no reference to the present state of the world, such as Russell's "The present King of France is bald" (France does not presently have a king) from "On Denoting" [21] (also see definite description).

In literature and entertainment

Another approach is to create a syntactically-well-formed, easily parsable sentence using nonsense words; a famous such example is "The gostak distims the doshes". Lewis Carroll's Jabberwocky is also famous for using this technique, although in this case for literary purposes; similar sentences used in neuroscience experiments are called Jabberwocky sentences.

In a sketch about linguistics, British comedy duo Fry and Laurie used the nonsensical sentence "Hold the newsreader's nose squarely, waiter, or friendly milk will countermand my trousers." [22]

The Star Trek: The Next Generation episode "Darmok" features a race that communicates entirely by referencing folklore and stories. While the vessel's universal translator correctly translates the characters and places from these stories, it fails to decipher the intended meaning, leaving Captain Picard unable to understand the alien.

See also

Notes

  1. ↑ In linguistics, an asterisk is used to denote a string of words that is ungrammatical.

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References

  1. 1 2 Chomsky, Noam (September 1956). "Three Models for the Description of Language" (PDF). IRE Transactions on Information Theory. 2 (3): 113–124. doi:10.1109/TIT.1956.1056813. S2CID   19519474. Archived (PDF) from the original on 2016-03-07.
  2. ↑ Chomsky, Noam (1957). Syntactic Structures. The Hague/Paris: Mouton. p. 15. ISBN   3-11-017279-8.
  3. ↑ Erard, Michael (2010). "The Life and Times of 'Colorless Green Ideas Sleep Furiously'". Southwest Review. 95 (3): 418–425. JSTOR   43473072 . Retrieved 2022-04-14.
  4. ↑ Hollander, John (1971-09-03). "Coiled Alizarine". JSTOR . Retrieved 2021-04-14.
  5. ↑ Erard, Michael (2010). "The Life and Times of 'Colorless Green Ideas Sleep Furiously'". MIT . 95 (3): 418–425. JSTOR   43473072 . Retrieved 2022-04-14.
  6. ↑ Hollander, John (1971-09-03). "Coiled Alizarine". JSTOR . Retrieved 2021-04-14.
  7. ↑ Roman Jakobson (1959). "Boas' view of grammatical meaning". The anthropology of Franz Boas; Essays on the Centennial of His Birth (American Anthropological Association, Memoir LXXX ed.). Menasha, Wisconsin: American Anthropological Association. pp. 134–145.
  8. ↑ Erard, Michael (2010). "The Life and Times of 'Colorless Green Ideas Sleep Furiously'". Southwest Review. 95 (3): 418–425. JSTOR   43473072 . Retrieved 2022-04-14.
  9. ↑ Erard, Michael (2010). "The Life and Times of 'Colorless Green Ideas Sleep Furiously'". Southwest Review. 95 (3): 418–425. JSTOR   43473072 . Retrieved 2022-04-14.
  10. ↑ Chao, Yuen Ren. "Making Sense Out of Nonsense". The Sesquipedalian, vol. VII, no. 32 (June 12, 1997). Archived from the original on 2006-08-30. Retrieved 2006-08-30.
  11. ↑ Erard, Michael (2010). "The Life and Times of 'Colorless Green Ideas Sleep Furiously'". Southwest Review. 95 (3): 418–425. JSTOR   43473072 . Retrieved 2022-04-14.
  12. ↑ "Colorless Green Ideas". MIT . 1991-09-03. Archived from the original on 2011-02-11. Retrieved 2007-03-14.
  13. ↑ Galantucci, Bruno; Roberts, Gareth (2014-07-29). "Do We Notice when Communication Goes Awry? An Investigation of People's Sensitivity to Coherence in Spontaneous Conversation". PLOS ONE. 9 (7): e103182. Bibcode:2014PLoSO...9j3182G. doi: 10.1371/journal.pone.0103182 . ISSN   1932-6203. PMC   4114551 . PMID   25072250.
  14. ↑ Galantucci, Bruno; Roberts, Gareth; Langstein, Benjamin (2018-07-01). "Content deafness: When coherent talk just doesn't matter". Language & Communication. 61: 29–34. doi:10.1016/j.langcom.2018.01.001. ISSN   0271-5309. S2CID   148959394.
  15. ↑ Norvig, Peter (2012-08-09). "Colorless green ideas learn furiously: Chomsky and the two cultures of statistical learning". Royal Statistical Society. 9 (4): 30–33. doi: 10.1111/j.1740-9713.2012.00590.x . S2CID   62687631.
  16. ↑ Pereira, Fernando (2000). "Formal grammar and information theory: together again?" (PDF). Philosophical Transactions of the Royal Society. 358 (1769): 1239–1253. Bibcode:2000RSPTA.358.1239P. doi:10.1098/rsta.2000.0583. S2CID   14205780. Archived from the original (PDF) on 2006-06-24. Retrieved 2006-03-28.. See also this post at Language Log.
  17. ↑ Harman, Gilbert H. (1966-04-01). "The Adequacy of Context-Free Phrase-Structure Grammars". WORD. 22 (1–3): 276–293. doi: 10.1080/00437956.1966.11435454 . ISSN   0043-7956.
  18. ↑ Rudolf Carnap (1931). "Überwindung der Metaphysik durch logische Analyse der Sprache" (PDF). Erkenntnis. 2: 219–241. doi:10.1007/BF02028153. S2CID   144658746. Archived (PDF) from the original on 2016-03-28.—English translation:Rudolf Carnap (1966). "The Elimination of Metaphysics Through Logical Analysis of Language" (PDF). In A.J. Ayer (ed.). Logical Positivism. The Library of Philosophical Movements. New York: The Free Press. pp. 60–81. ISBN   978-0029011300. Archived (PDF) from the original on 2021-07-20.
  19. ↑ Bertrand Russell (1940). An Inquiry into Meaning and Truth. New York: W. W. Norton & Company. Here: p.166
  20. ↑ Willard Van Orman Quine (1981). Theories and Things. Cambridge: Harvard Univiversity Press. Here: Ch.12 "On the Individuation of Attributes", p.110
  21. ↑ Russell, Bertrand (October 1905). "On Denoting". Mind. Oxford: Oxford University Press on behalf of the Mind Association. 14 (56): 479–493. doi:10.1093/mind/XIV.4.479. ISSN   0026-4423. JSTOR   2248381. Here: p.483
  22. ↑ "The people who study the meaning of nonsense".
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