What kind of causality is this, given that you assert that the correct thing to do in smoking lesions is refrain from smoking, and smoking lesions is one of the standard things where CDT says to smoke?
Recursive causality.
"A causes B, therefore B causes A" is a fallacy no matter what arguments you put forward.
Perfect mutual correlation means both that A->B and that B->A.
CDT asserts the opposite, and so if you claim this then you disagree with CDT.
No it doesn't.
You don't understand what counterfactuals are.
A counterfactual is a state of existence which is not true of the universe. It is not a contradiction.
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?