diff --git a/why-not-json.md b/why-not-json.md
index a4e950a..6d9334d 100644
--- a/why-not-json.md
+++ b/why-not-json.md
@@ -153,5 +153,9 @@ JSON itself does not offer any guidance for which of these options to
 choose. In many real cases on the web, poor choices have led to
 encodings that are irrecoverably ambiguous.
 
+**Update 20230123**. [This
+article](https://gist.github.com/FeepingCreature/d2fd982f485973a154abcaf0ccb4003c) discusses
+another subtle aspect of the problems caused by the lack of tagging in JSON.
+
 <!-- Heading to visually offset the footnotes from the main document: -->
 ## Notes