Brain Dead: Legally Dead Yet Alive?

𝐀𝐫𝐞 𝐁𝐫𝐚𝐢𝐧-𝐃𝐞𝐚𝐝 𝐏𝐞𝐨𝐩𝐥𝐞 𝐑𝐞𝐚𝐥𝐥𝐲 𝐃𝐞𝐚𝐝?