Yes.
Discussion
What is the use case?
If you have to trust someone to fulfill the promise of the IOU he owes you, why do you need a semi-trustless decentralized protocol to manage these IOUs?
Yes.
What is the use case?
If you have to trust someone to fulfill the promise of the IOU he owes you, why do you need a semi-trustless decentralized protocol to manage these IOUs?