You need to file a Injured spouse form. This would be done by the party who belives they are not liable.
No he hasnt
No, she hasnt gotten married yet. That's a lie.
there hasnt been a ww3
the mom because not(hasnt) not(double negative has) not(hasnt) person that has not (has [double negative]) not (hasnt) set foot on the moon
it hasnt
hasnt
He hasnt.
he hasnt
he hasnt
it hasnt
she hasnt died!
She hasnt yet