diff --git a/pynars/NARS/InferenceEngine/KanrenEngine/util.py b/pynars/NARS/InferenceEngine/KanrenEngine/util.py
index 000353c..0bfc449 100644
--- a/pynars/NARS/InferenceEngine/KanrenEngine/util.py
+++ b/pynars/NARS/InferenceEngine/KanrenEngine/util.py
@@ -176,6 +176,7 @@ def logic(term: Term, rule=False, substitution=False, var_intro=False, structura
 #################
 # LOGIC TO TERM #
 #################
+@cache
 def term(logic, root=True):
     # additional variable handling
     if root: vars_all.clear()
diff --git a/pynars/Narsese/_py/Term.py b/pynars/Narsese/_py/Term.py
index b240611..cc39b58 100644
--- a/pynars/Narsese/_py/Term.py
+++ b/pynars/Narsese/_py/Term.py
@@ -217,8 +217,8 @@ def _build_vars(self):
 
 
     def clone(self):
-        # clone = copy(self)
-        return self
+        clone = deepcopy(self)
+        return clone
 
     def _normalize_variables(self):
         ''''''