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As the title says, why is Tokyo Ghoul's second season called √A?

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  • Probably standing for Root A. "A" standing for Aogiri and "Root" for the root of a tree.
    – user18961
    Nov 7, 2015 at 20:10

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√A ("root A") is a reference to and pun on the Aogiri Tree organization, which is the focus of the second season. "A" is simply the first letter of the organization, and the root is a pun on tree root (since it's the Aogiri Tree).

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    There is another theory that it's "Route A", since the anime has some deviation at the beginning of the season.
    – nhahtdh
    Mar 27, 2015 at 17:51
  • @nhahtdh Interesting. I could see that being a plausible explanation, too.
    – Cattua
    Mar 27, 2015 at 17:53
  • nhahtdh's theory is the one that I have heard.
    – Brad Whoville
    Mar 27, 2015 at 22:16

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