lojban history book
A list of reasons why certain additions, changes and artifacts in Lojban exist. It helps people explain and understand the language as is. This list would also prevent history from repeating itself. For a list of common beginner misunderstanding database see common beginner misunderstanding database.
Why does .y. exist?
Apparently it started with Loglan which had an unofficial "drag" character rrr, which eventually got incorporated with the language. From then Lojban was developed, using Y. (Folk law, until someone corrects it.)