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@@ -191,7 +191,9 @@ We've posted a [[State Monad Tutorial]].
 
 (**Week 12**) Thursday April 23
 
-> Topics: Mutation and hyper-synonymy; [[Abortable list traversals|/topics/week12_abortable_traversals]]; List and tree zippers; Homework
+> Topics: Mutation and hyper-synonymy (no notes); [[Abortable list traversals|/topics/week12_abortable_traversals]]; [[List and tree zippers|/topics/week12_list_and_tree_traversals]]; Homework <!-- [[Homework|exercises/assignment12]] -->
+
+> For amusement/tangential edification: [xkcd on code quality](https://xkcd.com/1513/); [turning a sphere inside out](https://www.youtube.com/watch?v=-6g3ZcmjJ7k)
 
 
 ## Course Overview ##