This question is daily from my husband who has had several strokes and is physically & mentally disabled (vascular dementia). He can seem perfectly of sound mind at times but then has delusions and does not grasp the fact that he can not ambulate safely without standby assistance, is incontinent, unable to dress himself, has been losing weight for 4 months, etc, etc. He becomes severely agitated, yelling and screaming because he thinks he's at home and there are strangers in his house and someone changed the flooring and everything else, or that they made a duplication of his room and he's in the wrong one. I've told him repeatedly that I'm unable to care for him anymore and he just argues that he can care for himself. I gently put him off but I can never leave without feeling like I've let him down.