This isn&#x27;t unusual in software. There are still ambiguities around edge-cases in surprisingly important specifications. For instance, apparently, even after 20 years of HTTP we still can&#x27;t be sure we&#x27;ve nailed down a correct grammar[0]. I&#x27;m also in possession of a DNS zone file (a format that was very loosely specified going on 30  years ago) that is parsed 3 different ways by 3 different vendors.<p>[0] <a href="https:&#x2F;&#x2F;www.rfc-editor.org&#x2F;errata_search.php?rfc=7230&amp;eid=4189" rel="nofollow">https:&#x2F;&#x2F;www.rfc-editor.org&#x2F;errata_search.php?rfc=7230&amp;eid=41...</a>