diff --git a/naive-nlu/tree_nlu/knowledge_evaluation.py b/naive-nlu/tree_nlu/knowledge_evaluation.py
index 2a87077..6651050 100644
--- a/naive-nlu/tree_nlu/knowledge_evaluation.py
+++ b/naive-nlu/tree_nlu/knowledge_evaluation.py
@@ -274,7 +274,7 @@ def integrate_information(knowledge_base, example):
 
 def can_be_used_in_place(knowledge, token, minisegment):
     if token not in knowledge.knowledge:
-        return False
+        return True
 
     info = knowledge.knowledge[token]
     info_groups = info.get('groups', set())