Pretty good one Tamidala!
Anyway, on the dead thing, if you look at it like I am married now so my single part of my life is dead, or I've transitioned from college to working so my college days are now dead, I think it makes sense for Obi to be dead. Its a metaphor, dead meaning not phyical but a period of ones life. Obi's days of the old Jedi Order are dead and gone, as it that world and galaxy. Now there is a new order and a new world and Obi has assumed a new role in the new order.