3. Apply per-script thresholds. Cyrillic confusables at 0.447 mean SSIM require aggressive blocking. Mathematical Alphanumeric Symbols at 0.302 can be handled more permissively, especially since NFKC already collapses most of them. Arabic at 0.205 generates almost no genuine visual confusion and can be deprioritised entirely.
Жители Санкт-Петербурга устроили «крысогон»17:52
，这一点在搜狗输入法2026中也有详细论述
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Instead, it focuses on explicit boundaries, predictable behavior,