diff --git a/spec/expression.dd b/spec/expression.dd
index 23948f6053..4229b72af3 100644
--- a/spec/expression.dd
+++ b/spec/expression.dd
@@ -2179,6 +2179,12 @@ $(GNAME AssertArguments):
     )
     )
 
+    $(RATIONALE
+    The rationale for and proper use of `assert` comes up now and then.
+    Here is a long discussion of it:
+    $(LINK2 Logic Bugs vs Input Errors, https://digitalmars.com/d/archives/digitalmars/D/Program_logic_bugs_vs_input_environmental_errors_244143.html)
+    )
+
 $(H3 $(LNAME2 mixin_expressions, Mixin Expressions))
 
 $(GRAMMAR