diff --git a/journal/2021-01-24.md b/journal/2021-01-24.md
index 8faa20109..c81345104 100644
--- a/journal/2021-01-24.md
+++ b/journal/2021-01-24.md
@@ -28,7 +28,8 @@
 - [[isoperimetric inequality]]
 - [[social coop]]
   - [[socialcoop]]
-- [[itertools]]
+- [[node permutations]]
+  - [[itertools]]
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [push]: ../push "Push"
diff --git a/node-permutations.md b/node-permutations.md
new file mode 100644
index 000000000..7853dac26
--- /dev/null
+++ b/node-permutations.md
@@ -0,0 +1,9 @@
+# Node Permutations
+
+- The [[agora]] will try to serve node permutations if it doesn't have an exactly matching node.
+  - https://twitter.com/flancian/status/1353435256439910402
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[agora]: agora "Agora"
+[//end]: # "Autogenerated link references"
\ No newline at end of file