diff options
| -rw-r--r-- | prolog/problems/family_relations/ancestor_2/common.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/prolog/problems/family_relations/ancestor_2/common.py b/prolog/problems/family_relations/ancestor_2/common.py index 49df9ad..7f6beea 100644 --- a/prolog/problems/family_relations/ancestor_2/common.py +++ b/prolog/problems/family_relations/ancestor_2/common.py @@ -85,7 +85,7 @@ def hint(code, aux_code): # TODO: how will ask_truth handle/return timeouts... # TODO: timeout is the same as fail in this particular case if prolog.engine.ask_truth(engine_id, - 'parent(X, Y), \+ ancestor(X, Y)'): + '\+ (findall(X/Y, parent(X, Y), L), member(X/Y, L), \+ ancestor(X, Y))'): return [{'id': 'base_case'}] # ancestor to oneself |