Jacob was Vincent?

I'm currently doing my lost rewatch and i thought about how MIb is smokey, what if jacob is something? My first thought was the polar bear but now i think that it is Vincent. There is one scene where Jack,Kate and Charlie go to the cock pit and then you see Vincent watching them.This also makes sense because in jacobs cabin there is a picture of a man with a dogs head. this just what i think, i am probably wrong but i just thought i'd put it out there :)

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