What is the ruling if the two sons contest the testimony of unrelated witnesses regarding the manumission of Ghanim, asserting only Salim was manumitted?

Primary text

The sons' rejection of the testimony concerning Ghanim is not accepted because the testimony confirming manumission (the positive assertion) takes precedence over the testimony denying it (the negative assertion). The ruling concerning Ghanim follows the case where the heirs did not contest the testimony: he is freed if his manumission preceded the death or if lots favor him, and he remains a slave if his manumission was later or the lot favors another. The manumission confirmed by the sons (Salim) is fully established due to their admission, making him free.