diff --git a/learning/observationtable.py b/learning/observationtable.py
index 0b69eac9c1cb0ae853b8c51abfc4d3fc2f271d3b..7dccc5dcb16712732222a1a26de1ffb6d1792820 100644
--- a/learning/observationtable.py
+++ b/learning/observationtable.py
@@ -194,6 +194,8 @@ class Table:
         for row in rows:
             if row not in self._entries.keys():
                 self._logger.warning("Promoting rows: "+ str(row) +" is not in the table.")
+            elif not self.isDefined(row):
+                self._logger.warning("Promoting rows: "+ str(row) +" is not defined.")
             else:
                 self._rowsInS.add(th.flatten(row, self._quiescence))
 
@@ -689,6 +691,7 @@ class Table:
 
     # Update an entry in the table. If it does not exist, create it
     # observation is the answer of the observation oracle
+    # TODO: observation oracle? should be replaced with possible outputs?
     def updateEntry(self, trace, output=None, observation=None):
         trace = th.flatten(trace, self._quiescence)
         if trace in self._entries: