Ambiguity
Ambiguity is a
type of uncertainty
of meaning in which several interpretations
are plausible. It is thus an attribute of any idea
or statement whose intended meaning cannot be definitively resolved according to
a rule or process with a finite number of steps. (The ambi-
part of the name reflects an idea of "two"
as in two meanings.)
Ambiguity is the presence of two or
more possible meanings
in a single passage. Adjective: ambiguous.
Linguistic
ambiguity can be a problem in law, because the interpretation
of written documents and oral agreements is often of paramount importance.
In addition, ambiguity is sometimes
regarded as a fallacy (commonly
known as equivocation) in
which the same term is used in more than one way.
The concept of ambiguity is
generally contrasted with vagueness. In ambiguity, specific and distinct interpretations
are permitted (although some may not be immediately apparent), whereas with
information that is vague, it is difficult to form any interpretation at the
desired level of specificity.
The
lexical
ambiguity of a word or phrase pertains to its having more than one
meaning in the language to which the word belongs. "Meaning" here
refers to whatever should be captured by a good dictionary. For instance, the
word "bank" has several distinct lexical definitions, including
"financial
institution" and "edge of a river". Another example is as in
"apothecary".
One could say "I bought herbs from the apothecary". This could mean
one actually spoke to the apothecary (pharmacist)
or went to the apothecary (pharmacy).
The
context in which an ambiguous word is used often makes it evident which of the
meanings is intended. If, for instance, someone says "I buried $100 in the
bank", most people would not think someone used a shovel to dig in the
mud. However, some linguistic contexts do not provide sufficient information to
disambiguate a used word.
TYPES OF AMBIGUITY
1. Lexical Ambiguity
Lexical
ambiguity can be addressed by algorithmic methods that automatically associate
the appropriate meaning with a word in context, a task referred to as word sense disambiguation.
According
to the editors of the MIT
Encyclopedia of the Cognitive Sciences (2001),
"True lexical ambiguity is typically distinguished from polysemy
(e.g., 'the N.Y. Times' as in this morning's edition of the newspaper versus
the company that publishes the newspaper) or from vagueness
(e.g., 'cut' as in 'cut the lawn' or 'cut the cloth'), though the boundaries
can be fuzzy."
Lexical
ambiguity is the presence of two or more possible meanings within a single
word. Also called semantic ambiguity
or homonymy.
Compare to syntactic ambiguity.
The
use of multi-defined words requires the author or speaker to clarify their
context, and sometimes elaborate on their specific intended meaning (in which
case, a less ambiguous term should have been used). The goal of clear concise
communication is that the receiver(s) have no misunderstanding about what was
meant to be conveyed. An exception to this could include a politician whose
"weasel words"
and obfuscation
are necessary to gain support from multiple constituents with mutually exclusive conflicting desires from
their candidate of choice. Ambiguity is a powerful tool of political
science.
More
problematic are words whose senses express closely related concepts.
"Good", for example, can mean "useful" or
"functional" (That's a good hammer), "exemplary" (She's
a good student), "pleasing" (This is good soup),
"moral" (a good person versus the lesson to be learned from
a story), "righteous", etc. " I have a good daughter" is
not clear about which sense is intended. The various ways to apply prefixes
and suffixes
can also create ambiguity ("unlockable" can mean "capable of
being unlocked" or "impossible to lock").
Lexical
ambiguity is concerned with multiple interpretations of lexemes. A word is
ambiguous if it involves two lexical items that have identical forms, but have
distinct, i.e. unrelated meanings. There are numerous examples of lexical
ambiguity. A clear-cut one is the lexeme ball. This word may either
denote the round object which is used for several sports, like football,
volleyball or basketball, or it can be used to refer to a large formal dancing
party. Both forms are identically written and pronounced but just accidentally
share the same form: ball in the sense of the round object originates in
the Old Norse word ‘ballr’, whereas ball as the formal event comes from
Greek ‘ballizar’ (meaning ‘to dance’) and was first attested in the English
language in the 1630s being introduced through Old French. (Online Etymological
Dictionary) Another example by Chierchia & McConnell-Ginet (1993) is the
following sentence: You should have seen the bull we got from the Pope.
The sentence is ambiguous, because the word bull may stand for several
distinct things – either a male animal of different kinds, a swearword or an
official order or statement from the Pope. As ambiguity is context dependent
lexical disambiguation (knowing which word meaning has been used) is quite easy
in most cases when considering previous expectations and context (p. 32).
The
most classical example of lexical ambiguity is bank, which may either
denote an organization providing financial services, or the side of a river –
just to mention two of the lexeme’s possible meanings.
Further
examples of lexical ambiguity are:
bright
- a bright (intelligent) person vs. bright (sunny) weather
file
- arranged collection of papers vs. metal tool
Demonstrations of words which have
multiple meanings dependent on context.
- In port, the portly porter ported the port, through the port port. (At the dock, the fat mover moved the wine, through the left window)
- Will, will Will will Will Will's will?[1]
- Time flies like an arrow; fruit flies like a banana
- Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo. (Buffaloes from Buffalo, NY, whom buffaloes from Buffalo bully, bully buffaloes from Buffalo.)
- Rose rose to put rose roes on her rows of roses. (Robert J. Baran) (Rose [a person] rose [stood] to put rose [pink-colored] roes [fish eggs as fertilizer] on her rows of roses [flower].)
- James while John had had had had had had had had had had had a better effect on the teacher[2] (With punctuation: "James, while John had had 'had', had had 'had had'. 'Had had' had had a better effect on the teacher".)
- That that is is that that is not is not is that it it is (Grammatically corrected as: "That that is, is. That that is not, is not. Is that it? It is").
- If it is it, it is it. If it is, it is it, it is! (If an object is the object, it is the object. If it is the object, then it is the object, it is!)
- A ship-shipping ship shipping shipping ships (A boat-delivering boat delivering delivery boats)
- He jarred ajar a jar of Jar-Jar's jarred charred chard and char giardiniera.
- That that exists exists in that that that that exists exists in.
- Better betters better betters better better better better betters better.
- Can can can can can can can can can can. ("Examples of the can-can dance that other examples of the same dance are able to outshine, or figuratively to put into the trashcan, are themselves able to outshine examples of the same dance". It could alternatively be interpreted as a question, "Is it possible for examples of the dance that have been outshone to outshine others?" or several other ways.)
- If police police police police, who police police police? Police police police police police police.[3] (If the police police is what you might call the people who supervise, monitor, and maintain order amongst the regular police force, then who, in turn, supervises the police police? The answer: the police police police. Hyphenating the noun constructs makes this easier to follow. Therefore, "[The] police-police [, that the] police-police-police police [, themselves] police [the] police", which means that "the police-police, who are policed by the police-police-police, are themselves responsible for policing the regular police force". In these sentences, the word police is used both as a collective noun ("police force") and as a verb ("to police [someone or something]"). This clause is also a reduced relative clause, so the word that, which could appear between the second and third words of the sentence, is omitted.)
- In a similar vein, Martin Gardner offered the example: "Wouldn't the sentence 'I want to put a hyphen between the words Fish and And and And and Chips in my Fish-And-Chips sign' have been clearer if quotation marks had been placed before Fish, and between Fish and and, and and and And, and And and and, and and and And, and And and and, and and and Chips, as well as after Chips?"
2. Syntactic Ambiguity
In
grammar,
syntactic ambiguity
is the presence of two or more possible meanings
within a single sentence or sequence of words. Also called grammatical ambiguity. Compare with
lexical ambiguity.
The intended meaning of a syntactically ambiguous sentence can often (but not always) be determined by context.
Syntactic ambiguity arises when a sentence can
have two (or more) different meanings because of the structure of the
sentence—its syntax. This is often due to a modifying expression, such as a
prepositional phrase, the application of which is unclear. "He ate the
cookies on the couch", for example, could mean that he ate those cookies
that were on the couch (as opposed to those that were on the table), or it could
mean that he was sitting on the couch when he ate the cookies. "To get in,
you will need an entrance fee of $10 or your voucher and your drivers'
license." This could mean that you need EITHER ten dollars OR BOTH your
voucher and your license. Or it could mean that you need your license AND you
need EITHER ten dollars OR a voucher. Only rewriting the sentence, or placing
appropriate punctuation can resolve a syntactic ambiguity.[2]
For the notion of, and theoretic results about, syntactic ambiguity in
artificial, formal languages (such as computer programming languages), see Ambiguous
grammar.
Spoken
language can contain many more types of ambiguities which are called
phonological ambiguities, where there is more than one way to compose a set of
sounds into words. For example, "ice cream" and "I scream".
Such ambiguity is generally resolved according to the context. A mishearing of
such, based on incorrectly resolved ambiguity, is called a mondegreen.
Demonstrations of ambiguity between
alternative syntactic structures underlying a sentence.
- I saw the man with the binoculars.
- They are hunting dogs.
- Free whales.
- Police help dog bite victim.
- He saw that gas can explode.
- Turn right here.
- We saw her duck.[5]
- One morning I shot an elephant in my pajamas. How he got in my pajamas, I don't know.[6]
- Ship sails tomorrow.
- Book stays in London.
- Wanted: a nurse for a baby about twenty years old.
- The girl in the car that needed water is waiting.
- "Now I see," said the blind carpenter as he picked up his hammer and saw.
- Those prosecutors have been trying to lock him up for ten years.
- Flying planes can be dangerous.
- I once saw a deer riding my bicycle.
- Look at the dog with one eye.
3. Structural
Ambiguity
Structural
ambiguity is a result of two or more different syntactic structures that can be
attributed to one string of words. That means that a sentence is structurally
ambiguous not because it contains a single lexeme that has several distinct
meanings, but because the syntactic structure of the sentence causes multiple
interpretations.
·
Young boys and girls love the adventure playground.
This
sentence is syntactically ambiguous, because the reference of young is
unclear. There are two possible interpretations of the subject. It may either
be that [young boys] and girls love the adventure playground, or young
[boys and girls] love [it]. The structural analysis shows that the sentence
may be interpreted in a way that young only refers to the boys, or it
may be understood as characterising the boys as well as the girls.
·
Flying planes can be dangerous.
This
often quoted example of structural (also called syntactic) ambiguity comes from
Noam Chomsky. Sentences that contain lexemes that change their word form or
even word class depending on the sentence’s interpretation are part of this
category. Flying planes in this example sentence may be understood as
“to fly planes” as well as “planes, which fly”. Therefore, the lexeme flying
can be interpreted as the gerund form of a verb in a verb phrase, or as an
attribute of a noun phrase.
There
are several linguists, who have come up with similar examples like the last
one. Lyons (1975) (cf. pp. 212f.) as well as Langacker (1993) (cf. p. 432), for
example, determine those instances as grammatically ambiguous. The terms
structural, syntactic and grammatical ambiguity are basically interchangeable.
Lyons’
examples for grammatical ambiguity are the following:
·
They can fish.
The
ambiguous interpretation is a result of “the double classification” of fish
(either intransitive verb or noun) as well as of can (either auxilliary or
transitive verb).
·
Beautiful girl’s dress
This
is an example similar to the first one of structural ambiguity. It is a
question of reference and therefore, may either be understood as [beautiful
girl’s] dress or beautiful [girl’s dress]. Is the adjective beautiful
attributed to the girl or to the dress? That question makes the
reading of the sentence ambiguous.
However,
Lyons points out that these cases of free interpretation are hardly leading to
misinterpreations in natural language use. It usually gets quite obvious which
meaning is aimed at through the rest of the sentence and the context.
4. Transformational
Ambiguity
The
category of transformational ambiguity is mentioned by Lyons (1975), who
characterises its prototypes as “ambiguous constructions which depend upon the
‘deeper connexions’” (p. 249). Furthermore, he points out that these
constructions are mostly only ambiguous out of context. One of his examples is
the phrase the love of God. Isolated from any textual relations it is
unclear whether God is the subject or the object in this noun phrase.
Additionally, Lyons quotes Chomsky’s already mentioned example of flying
planes, which he – in contrast to other linguists – counts as belonging to
transformational ambiguity. Basically, neither categorization is wrong as many
linguists do not distinguish transformational from grammatical ambiguity. Thus,
transformational ambiguity is a subcategory of grammatical ambiguity.
Another
Chomskian example mentioned by Lyons is: the shooting of the hunters.
This is the same case as the God-example: it is unclear whether the
hunters are subject or object in this phrase.
5. Scope
Ambiguity
A
further type of ambiguity called scope ambiguity is discussed by Chierchia and
McConnell-Ginet (1993), among others. It is a subcategory of structural
ambiguity. However, scope ambiguity can be distinguished from structural
ambiguity through its “single surface syntactic structure” (p. 33). Chierchia
and McConnell-Ginet’s example for this subcategory is: Someone loves
everyone. This sentence can either mean ‘Everyone is loved by (at least)
one person.’ or ‘There is a person and this person loves everyone.’ Note that
in the former case someone may denote several different individuals,
whereas it is only one single individual in the latter case.
6. Pun
A pun is a special form of ambiguity (mostly lexical)
that is consciously used to create statements with ambiguous – distinct –
meanings. That means that a pun is a play with words involving and creating
double contexts (cf. Tuggy 1993: pp. 168, 178). Puns in spoken discourse make
use of homophones, and puns in written discourse utilize homographs. Punning is
a useful tool for jokes, creating at least two meanings – mostly a literal as
well as a figurative one. Here is one example: After he ate the duck, the
alligator got a little down in the mouth.