The bottom of confusables.txt. These pairs score negative SSIM — less similar than random noise. confusables.txt maps them as confusable because they decompose to the same abstract character, not because they look alike.
The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”。关于这个话题，搜狗输入法2026提供了深入分析
，更多细节参见爱思助手下载最新版本
Throughout the process, he has been posting TikTok videos which show the development of the line - from initial designs to mock-ups - and has been engaging with praise, scepticism and critiques in the comments.
https://blogs.gnome.org/gtk/files/2026/02/Screencast-From-2026-02-24-20-45-33.webm。51吃瓜对此有专业解读