optimized conjunctive function and changed tests to fit

src/main/py/logical_operations.py

@@ -7,8 +7,10 @@ def identity_disconjunctive(first_input, operator, second_input):
         return 1
 
 
-def identity_conjunctive(variable, operator, zero):
-    if zero == 1 and operator == ".":
-        return variable
-    else:
+def identity_conjunctive(first_input, operator, second_input):
+    if first_input == 1 and second_input == 1:
+        return 1
+    elif first_input == 0 and second_input == 0:
         return None
+    else:
+        return 0

src/test/py/test_logical_operations.py

@@ -25,7 +25,7 @@ class calculationsWithRoots(unittest.TestCase):
         self.assertEqual(identity_conjunctive(0, ".", 0), None)
 
     def test_conjunctive_identity_1_and_0_equals_None(self):
-        self.assertEqual(identity_conjunctive(1, ".", 0), None)
+        self.assertEqual(identity_conjunctive(1, ".", 0), 0)
 
     def test_conjunctive_identity_0_and_1_equals_0(self):
         self.assertEqual(identity_conjunctive(0, ".", 1), 0)