Just because someone's a prisoner doesn't mean they can not refuse to have treatment.

NPR: Doctors Urge U.S. to Stop Force-Feeding Detainees

Whether or not the Ulster Unionists sit down at the table opposite Sinn Fein, only agree to attend if they can sit in another room, or refuse to talk to anyone but the British government, may not matter that much.

ECONOMIST: Sinn Fein comes on board