diff --git a/.hash b/.hash
index c36775f..375bee6 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,5 @@
 ainotes.cls,5cf6955
-year1/cognition-and-neuroscience/module1,4a90d7e
+year1/cognition-and-neuroscience/module1,0439833
 year1/cognition-and-neuroscience/module2,76ce622
 year1/combinatorial-decision-making-and-optimization/module1,92c473b
 year1/combinatorial-decision-making-and-optimization/module2,92c473b
diff --git a/year1/cognition-and-neuroscience/module1/cn1.pdf b/year1/cognition-and-neuroscience/module1/cn1.pdf
new file mode 100644
index 0000000..e055e24
Binary files /dev/null and b/year1/cognition-and-neuroscience/module1/cn1.pdf differ