Additional improvements to hints for mother, father, grandparent, sister, and brother problems.

1 files changed, 4 insertions, 4 deletions

diff --git a/prolog/problems/family_relations/sister_2/common.py b/prolog/problems/family_relations/sister_2/common.py
index 2be3ab3..8493007 100644
--- a/prolog/problems/family_relations/sister_2/common.py
+++ b/prolog/problems/family_relations/sister_2/common.py
@@ -91,6 +91,10 @@ def hint(code, aux_code):
     try:
         engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
 
+        # use of \= or =\= instead of \==
+        if prolog.util.Token('NEQU', '\=') in tokens or prolog.util.Token('NEQA', '=\=') in tokens:
+            return [{'id': 'neq+_instead_of_neq'}]
+
         # target predicate seems to always be false
         if not prolog.engine.ask_truth(engine_id, 'sister(_, _)'):
             return [{'id': 'predicate_always_false'}]
@@ -112,10 +116,6 @@ def hint(code, aux_code):
            prolog.engine.ask_one(engine_id, 'sister(_, Y), male(Y)') == 'false':
             return [{'id': 'y_can_be_of_any_gender'}]
 
-        # use of \= or =\= instead of \==
-        if prolog.util.Token('NEQU', '\=') in tokens or prolog.util.Token('NEQA', '=\=') in tokens:
-            return [{'id': 'neq+_instead_of_neq'}]
-
         # X and Y must be different
         # this is the last code-specific hint (when everything else doesn't trigger anymore)
         if prolog.util.Token('NEQ', '\==') not in tokens and prolog.engine.ask_truth(engine_id,