def test_MODS_satisfiable(sentence: nnf.Or):
if len(sentence.children) > 0:
assert sentence.satisfiable()
else:
assert not sentence.satisfiable()
def test_hyp(sentence: nnf.Or):
assume(len(sentence.children) != 0)
assume(sentence.decomposable())
assert sentence.satisfiable()
assert sentence.vars() <= set(range(1, 9))