Having a smoking lesion make you choose smoking is vague. Does it make you choose smoking by increasing the utility you gain from smoking, but not affecting your ability to reason based on this utility? Or does it make you choose smoking by affecting your ability to do logical reasoning?
In the former case, switching from nonsmoking to smoking because you made a logical conclusion should not affect your chances of dying, even though switching to smoking in general should affect your chance of dying.
In the latter case, switching to smoking should affect your chance of dying, but you are then asking a question which presupposes under some circumstances that you can't answer it.
You're given the option to torture everyone in the universe, or inflict a dust speck on everyone in the universe. Either you are the only one in the universe, or there are 3^^^3 perfect copies of you (far enough apart that you will never meet.) In the latter case, all copies of you are chosen, and all make the same choice. (Edit: if they choose specks, each person gets one dust speck. This was not meant to be ambiguous.)
As it happens, a perfect and truthful predictor has declared that you will choose torture iff you are alone.
What do you do?
How does your answer change if the predictor made the copies of you conditional on their prediction?
How does your answer change if, in addition to that, you're told you are the original?