diff --git a/robustness.py b/robustness.py
index 6faac99..9b9e280 100644
--- a/robustness.py
+++ b/robustness.py
@@ -1,3 +1,5 @@
+# TODO: technically incorrect on 0 robustness since conflates < and >
+
 from functools import singledispatch
 from operator import sub, add