claire came to kate in a dream and tells her to never bring him back. i believe this was the work of mystery guy. i believe aaron will be the one to stop all this mess. he will be jacobs loop hole. oh and speaking of loop hole. the dharma logo for the orchid kinda looks like a loop hole. this is why mystery guy has taken the form of claires mom. however, this also leads me to believe that there is more than one person plotting against jacob. always two there are, no more. a master and an apperentice.