diff --git a/.hash b/.hash
index 74ee4df..44fefa8 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,5 @@
 ainotes.cls,4b2f613
-cognition-and-neuroscience,a1168a4
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 combinatorial-decision-making-and-optimization,35351cc
 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 ccf0bd8..1e9cdd7 100644
Binary files a/cognition-and-neuroscience/cn.pdf and b/cognition-and-neuroscience/cn.pdf differ