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Poto and Cabengo

Poto and Cabengo is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Poto and Cabengo rather than just read about it. In short: Poto and Cabengo (names given, respectively, by Grace and Virginia Kennedy to themselves) are American identical twins who used an invented language (cryptophasia) until the age of about eight. The girls were apparently of normal intelligence.

Key takeaways

  • Poto and Cabengo belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Poto and Cabengo to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Poto and Cabengo from memory before moving on to harder problems.

Reference excerpt

Poto and Cabengo (names given, respectively, by Grace and Virginia Kennedy to themselves) are American identical twins who used an invented language (cryptophasia) until the age of about eight. The girls were apparently of normal intelligence. They developed their own communication as they had little exposure to spoken language in their early years. Poto and Cabengo were the names they called each other. Poto and Cabengo is also the name of a documentary film about the girls made by Jean-Pierre Gorin and released in 1980.

Birth Grace and Virginia Kennedy were born in 1970 in Columbus, Georgia. Their birth was normal, and they were able to lift their heads and make eye contact with their parents within hours after birth, but both soon suffered apparent seizures. Their father maintained that a surgeon told him the girls might experience developmental disabilities. Apparently mistaking speculation for diagnosis, the girls' parents ceased to pay more attention to them than necessary.

Early circumstances Both parents were employed (although later characterized by The San Diego Tribune as living on "food stamps and welfare") and spent many hours away from home. The girls were left in the care of a grandmother who met their physical needs but did not play or interact with them. The grandmother spoke only German, while the parents spoke English. Kept largely isolated from the world, they had no contact with other children, seldom played outdoors, and were not sent to school. Their father later stated in interviews that he realized the girls had invented a language of their own, but, since their use of English remained extremely rudimentary, he had decided that they were, as the doctor suggested, developmentally challenged and that it would do no good to send them to school. When he lost his job, he told a caseworker at the unemployment office about his family; the caseworker advised him to put the girls in speech therapy. At the Children's Hospital of San Diego, in California, speech therapists Ann Koeneke and Alexa Kratze (née Romaine) discovered that Virginia and Grace had invented a complex idioglossia.

Language The twins' language was characterized by an extremely fast tempo and a staccato rhythm, traits the girls transferred to their spoken English following speech therapy. Linguistic analysis revealed that their language was a mixture of English and German (their mother and grandmother were German born) with some neologisms and several idiosyncratic grammatical features. The story of the "twins who made their own language" received media coverage in 1978 and was included in an edition of the People's Almanac. Speech and hearing experts and psychiatrists offered speculation as to why, in contrast to most idioglossic twins, the girls had failed to pick up English. Alexa Kratze pointed out that the girls had had very little contact with anyone outside their family and that contact within the family had been minimal at best, factors that contributed to the girls' developmental disability. Once it was established that the girls could be educated, their father apparently forbade them to speak their personal language. Time magazine wrote that, when asked by a visitor to the household if the girls remembered their language, Ginny responded that they did. However, their father dismissed this response as "lying." He is quoted as saying: "You live in a society, you got to speak the language. They don't want to be associated as dummies now." Despite being mainstreamed and placed in separate classes, the girls remained affected by their family's emotional neglect. A follow-up as they approached the age of 30 revealed that Virginia worked on an assembly line in a supervised job training center, while Grace mopped floors at the fast-food restaurant McDonald's.

Sample speech extract "Pinit, putahtraletungay." (Finish, potato salad hungry.) "Nis, Poto?" (This, Poto?) "Liba Cabingoat, it." (Dear Cabengo, eat.) "Ia moa, Poto?" (Here more, Poto?) "Ya." (Yeah.)

References

External links Poto and Cabengo at IMDb Poto And Cabengo: In The 1970s Grace and Virginia Kennedy Were Bigger Than The Loch Ness Monster

Worked examples

Example 1 — a first encounter with Poto and Cabengo

Start with the simplest possible case. Write down what Poto and Cabengo claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Poto and Cabengo before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Poto and Cabengo ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Poto and Cabengo

In research
Poto and Cabengo appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Poto and Cabengo in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Poto and Cabengo is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1970 births, 1980 films, American identical twins, so understanding it makes those chapters shorter.
In everyday life
Look for Poto and Cabengo outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Poto and Cabengo in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Poto and Cabengo means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Poto and Cabengo out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Poto and Cabengo in simple terms?

Poto and Cabengo (names given, respectively, by Grace and Virginia Kennedy to themselves) are American identical twins who used an invented language (cryptophasia) until the age of about eight. The girls were apparently of normal intelligence.

Why does Poto and Cabengo matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Poto and Cabengo?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Poto and Cabengo.

Tags

  • 1970 births
  • 1980 films
  • American identical twins
  • American people of German descent
  • Constructed language creators
  • Identical twin females
  • Living people
  • People from Columbus, Georgia

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