[1]
[CITE@en[RFC 793 - Transmission Control Protocol]]
<http://tools.ietf.org/html/rfc793#section-2.10>

>TCP implementations will follow a general principle of robustness:  be
conservative in what you do, be liberal in what you accept from
others.



[2] [CITE[IRC logs: freenode / #whatwg / 20100629]]
([TIME[2010-07-04 19:10:47 +09:00]] 版)
<http://krijnhoetmer.nl/irc-logs/whatwg/20100629#l-193>