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the first time i got it wrong but now I understand it. I don't have explanation for OA but I can try to explain my vision of the OA
(A) If D, then A.-> maybe other causes for D than just A, maybe Z->D
(B) If not B, then not C. -> same idea than above, maybe X -> C
(C) If not D, then not A. -> we know that A creates D, if there is no D, there is no way there is any A. this one is the good one.
(D) If D, then E. -> we have no information
(E) If not A, then not D. -> maybe other causes so that there is no A but there is a D.
Check out this awesome article about Anderson on Poets Quants, http://poetsandquants.com/2015/01/02/uclas-anderson-school-morphs-into-a-friendly-tech-hub/ . Anderson is a great place! Sorry for the lack of updates recently. I...