15-04-2021, 01:45 AM
A lipogram or a lipogrammatic text is a piece of writing in which the author deliberately avoids the use of a certain letter (or possibly letters, although this is not typical), using only words that do not contain that particular letter (or letters).
The concept goes all the way back to the Ancient Greek author Lasus of Hermione in the 6th century B.C., who wrote poems using only words that did not contain the letter sigma. This concept has reappeared in literature from time to time over the course of the three millennia since then. It would not be an unknown or unfamiliar concept to an early 15th century European author or student.
If taken to the extreme, lipogrammatic text could possibly explain some of the extremely unusual statistical properties of the Voynich manuscript text. Naturally it would likely require the avoidance of more than just one letter to achieve anything close to the extremely low entropy and conditional entropy values found in the Voynich ms text. The purpose of most historical literary lipograms was not to lower the entropy values of their texts, and I doubt the statistical analysis of actual historical literary examples of lipogrammatic text would find extremely low entropy values. But if the author of the Voynich ms carried this process to a certain extreme, it could be one part of the explanation for the statistical properties of the text that we observe.
For example, if an English writer wrote a lipogrammatic text using only words that do not contain the letter "a", very common words such as "and", "a", "that", "are", "was", "as", etc., would have to be absent from the text. (Full disclosure: This idea occurred to me while considering this very possibility for a Middle English text.) If the Voynich ms text is indeed lipogrammatic in this way, then we would have to consider not only the effect of the lack of a particular letter or letters on statistical properties of the text, but also the effect on the grammatical structure imposed by the necessity of avoiding, for example, such normally essential function words as "and", "a", "are", "was", etc., throughout an entire text.
Geoffrey C.
The concept goes all the way back to the Ancient Greek author Lasus of Hermione in the 6th century B.C., who wrote poems using only words that did not contain the letter sigma. This concept has reappeared in literature from time to time over the course of the three millennia since then. It would not be an unknown or unfamiliar concept to an early 15th century European author or student.
If taken to the extreme, lipogrammatic text could possibly explain some of the extremely unusual statistical properties of the Voynich manuscript text. Naturally it would likely require the avoidance of more than just one letter to achieve anything close to the extremely low entropy and conditional entropy values found in the Voynich ms text. The purpose of most historical literary lipograms was not to lower the entropy values of their texts, and I doubt the statistical analysis of actual historical literary examples of lipogrammatic text would find extremely low entropy values. But if the author of the Voynich ms carried this process to a certain extreme, it could be one part of the explanation for the statistical properties of the text that we observe.
For example, if an English writer wrote a lipogrammatic text using only words that do not contain the letter "a", very common words such as "and", "a", "that", "are", "was", "as", etc., would have to be absent from the text. (Full disclosure: This idea occurred to me while considering this very possibility for a Middle English text.) If the Voynich ms text is indeed lipogrammatic in this way, then we would have to consider not only the effect of the lack of a particular letter or letters on statistical properties of the text, but also the effect on the grammatical structure imposed by the necessity of avoiding, for example, such normally essential function words as "and", "a", "are", "was", etc., throughout an entire text.
Geoffrey C.