As a person who has dementia becomes upset, his ability to think and reason temporarily declines even more. It is useless to argue with him, explain things to him, or even ask him to complete a task when he is in the grip of a catastrophic reaction. Arguing, explaining, or restraining him may make things worse. Help him calm down and relax so that he can think as well as possible. Take him away from what upset him, if possible.
