Yeah they list a lot of requirements on this page: <a href="https:&#x2F;&#x2F;github.com&#x2F;google&#x2F;open-location-code&#x2F;blob&#x2F;master&#x2F;docs&#x2F;comparison.adoc" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;google&#x2F;open-location-code&#x2F;blob&#x2F;master&#x2F;doc...</a><p>Oddly I don&#x27;t see redundancy (error detection or better yet, error correction) in there but it seems to be an important part of human language.  They do make an effort to reduce symbols that could easily be confused at least.