---
language: 
- en
pretty_name: "Crab Canon"
tags:
- knowledge
- dialogue
- book-data
license: apache-2.0
task_categories:
- question-answering
---
# Dataset - crabcanon

- **Developed by:** maldv
- **License:** apache-2.0
- **Methodology:** Formatting book data by paragaph for training

## Description

A crab canon (also known by the Latin form of the name, canon cancrizans; as well as retrograde canon, canon per recte et retro or canon per rectus et inversus) is an arrangement of two musical lines that are complementary and backward. If the two lines were placed next to each other (as opposed to stacked), the lines would form something conceptually similar to a palindrome. The name 'crab' refers to the fact that crabs are known to walk backward (although they can also walk forward and sideways). It originally referred to a kind of canon in which one line is played backward (e.g. FABACEAE played simultaneously with EAECABAF). An example is found in J. S. Bach's The Musical Offering, which also contains a table canon ("Quaerendo invenietis"), which combines retrogression with inversion by having one player turn the music upside down.

Wikipedia

Long form book text from archive.org is a pain to wrangle.  This was an artifact of attempting to better understand the issues involved in 
managing this type of data for work on a tool to process books.

This is data artifacts from the processing and preparing of the book *Gödel, Escher, Bach: an Eternal Golden Braid* by Douglas Hofstadter.  A book
which is both Pulitzer Prize winning and highly relevant to the field of AI.  I have found this text imparts excellent logic skills, prose, and creativity; but does co-mingle dialogue and narritive sets which can be problematic.