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-rw-r--r--doc/refman/RefMan-cic.tex6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/refman/RefMan-cic.tex b/doc/refman/RefMan-cic.tex
index 7f9d4e5ecb..6db02c0f24 100644
--- a/doc/refman/RefMan-cic.tex
+++ b/doc/refman/RefMan-cic.tex
@@ -93,6 +93,12 @@ constraints must remain acyclic. Typing expressions that violate the
acyclicity of the graph of constraints results in a \errindex{Universe
inconsistency} error (see also Section~\ref{PrintingUniverses}).
+% TODO: The concept of 'universe inconsistency' deserves more attention.
+% Somewhere in the document we should:
+% - give concrete examples when universe inconsistency arises
+% - explain why it arised
+% - how can a user identify the "vicious cycle".
+
%% HH: This looks to me more like source of confusion than helpful
%% \subsection{Constants}