diff --git a/notes.md b/notes.md
index 47147ac84b46e44eaf5828206b473594d81d654e..705df53921e59db3cdc21468b96c941cef5a5f42 100644
--- a/notes.md
+++ b/notes.md
@@ -50,6 +50,18 @@ need followup.
   - https://www.hashicorp.com/license-faq#Why-is-HashiCorp-making-this-change
   - https://www.hashicorp.com/blog/hashicorp-adopts-business-source-license
 
+# Categorization question
+
+Is there a distinction to be made between these cases?
+
+* licenses that are not open source licenses but that state (in the license
+  text somewhere) that they automatically convert / automatically permit use
+  and redistribution subject to a specified open source license after a period
+  of time
+* publicly announced practices of manually relicensing old codebase snapshots
+  on a particular schedule, which depend on a person at the company explicitly
+  making a delayed open source release
+
 # Sources / Acknowledgements
 
 * Simon Phipps