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-rw-r--r--prolog/problems/family_relations/mother_2/common.py13
-rw-r--r--prolog/problems/family_relations/mother_2/sl.py5
2 files changed, 14 insertions, 4 deletions
diff --git a/prolog/problems/family_relations/mother_2/common.py b/prolog/problems/family_relations/mother_2/common.py
index 040c13e..1bb7a4b 100644
--- a/prolog/problems/family_relations/mother_2/common.py
+++ b/prolog/problems/family_relations/mother_2/common.py
@@ -25,6 +25,7 @@ hint_type = {
'x_must_be_parent': Hint('x_must_be_parent'),
'y_can_be_of_any_gender': Hint('y_can_be_of_any_gender'),
'y_need_not_be_parent': Hint('y_need_not_be_parent'),
+ 'predicate_always_false': Hint('predicate_always_false'),
}
test_cases = [
@@ -93,15 +94,19 @@ def hint(code, aux_code):
return [{'id': 'x_must_be_parent'}]
# Y can be of any gender, incl. male
- if prolog.engine.ask_one(engine_id,
- 'mother(_, Y), male(Y)') == 'false':
+ if prolog.engine.ask_truth(engine_id, 'mother(_, Y)') and \
+ prolog.engine.ask_one(engine_id, 'mother(_, Y), male(Y)') == 'false':
return [{'id': 'y_can_be_of_any_gender'}]
# Y does not necessarily need to be a parent
- if prolog.engine.ask_one(engine_id,
- 'mother(_, Y), \+ parent(Y, _)') == 'false':
+ if prolog.engine.ask_truth(engine_id, 'mother(_, Y)') and \
+ prolog.engine.ask_one(engine_id, 'mother(_, 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, 'mother(_, _)') == 'false':
+ return [{'id': 'predicate_always_false'}]
+
except socket.timeout as ex:
pass
diff --git a/prolog/problems/family_relations/mother_2/sl.py b/prolog/problems/family_relations/mother_2/sl.py
index e3cbd1e..5a98cb6 100644
--- a/prolog/problems/family_relations/mother_2/sl.py
+++ b/prolog/problems/family_relations/mother_2/sl.py
@@ -55,4 +55,9 @@ Pozor: velja eno ALI drugo, ne nujno eno IN drugo!</p>
'y_need_not_be_parent': '''\
<p><code>Y</code> pravzaprav ne rabi imeti otrok, da ima mamo...</p>
''',
+
+ 'predicate_always_false': '''\
+<p>Vse kaže, da tvoj predikat vedno vrne "false". Morda se splača preveriti, če si se kje zatipkal,
+je morda kakšna pika namesto vejice ali obratno, morda kakšna spremenljivka z malo začetnico?</p>
+''',
}