diff options
Diffstat (limited to 'prolog/problems/family_relations/father_2/common.py')
| -rw-r--r-- | prolog/problems/family_relations/father_2/common.py | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/prolog/problems/family_relations/father_2/common.py b/prolog/problems/family_relations/father_2/common.py index 11f0742..31109c9 100644 --- a/prolog/problems/family_relations/father_2/common.py +++ b/prolog/problems/family_relations/father_2/common.py @@ -67,6 +67,10 @@ def hint(code, aux_code): try: engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0) + # target predicate seems to always be false + if not prolog.engine.ask_truth(engine_id, 'father(_, _)'): + return [{'id': 'predicate_always_false'}] + # OR (;) instead of AND (,) # this hint has to be before the next two # as otherwise those two would always override it @@ -102,10 +106,6 @@ def hint(code, aux_code): prolog.engine.ask_one(engine_id, 'father(_, Y), \+ parent(Y, _)') == 'false': return [{'id': 'y_need_not_be_parent'}] - # target predicate seems to always be false - if prolog.engine.ask_one(engine_id, 'father(_, _)') == 'false': - return [{'id': 'predicate_always_false'}] - except socket.timeout as ex: pass |