Reconstructing Concurrency Invariants Through Medieval East Asian Logic

# Summary This article proposes that medieval East Asian logical and mechanical systems—particularly from 11th-14th century China and Korea—offer practical frameworks for solving modern concurrent programming problems, specifically double-free memory errors. The author maps classical concepts like Shao Yong's state transitions and mechanical escapement principles onto contemporary memory management issues, demonstrating how visibility and state exclusion rules from historical computing paradigms can inform safer concurrent memory deallocation in systems programming.