diff --git a/.hash b/.hash
index eb453ba..54142cb 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,5 @@
 ainotes.cls,4b2f613
-cognition-and-neuroscience,409ab70
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 combinatorial-decision-making-and-optimization,156827b
 deep-learning,44fbc43
 fundamentals-of-ai-and-kr/module1,1677e27
diff --git a/cognition-and-neuroscience/cn.pdf b/cognition-and-neuroscience/cn.pdf
index 1513f05..ccf0bd8 100644
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