<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Oct 25, 2017, at 02:34, Xiaodi Wu via swift-dev <<a href="mailto:swift-dev@swift.org" class="">swift-dev@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Please see earlier replies summarizing core team members' persuasive arguments as to why not multiple protocol hierarchies like this.</div></div></blockquote></div><br class=""><div class="">Hi Xiaodi,</div><div class=""><br class=""></div><div class="">The above line is does it help your argument. Even if a person was motivated to search through the entire mailing list archives looking for said arguments, they won’t be able to guess which arguments you found to be persuasive (and who was sufficiently “core” at the time, no less). Can you please provide URLs into the archives? Is that a big ask?</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Dave</div></body></html>