fix crash in diff function of inference engine

opennars · Mar 17, 2024 · fbccbd4 · fbccbd4
1 parent 6b85df2
commit fbccbd4
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/pynars/NARS/InferenceEngine/KanrenEngine/util.py b/pynars/NARS/InferenceEngine/KanrenEngine/util.py
@@ -344,9 +344,9 @@ def do_diff(t: Term):
             return calculate_difference(*c.terms.terms)
 
     # STATEMENT
-    elif type(c) is Statement \
-        and c.copula is Copula.Implication \
-        or c.copula is Copula.Inheritance:
+    elif type(c) is Statement and \
+        (c.copula is Copula.Implication \
+        or c.copula is Copula.Inheritance):
         # check subject
         subject = c.subject
         if subject.is_compound: