diff --git a/.hash b/.hash
index c012d0f..6d7b452 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,5 @@
 ainotes.cls,813f0b6
-cognition-and-neuroscience,7a710d0
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 fundamentals-of-ai-and-kr/module1,1677e27
diff --git a/cognition-and-neuroscience/cn.pdf b/cognition-and-neuroscience/cn.pdf
index d3b3614..cbac70a 100644
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