31 LR Two Question 18
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I cannot understand what switch is at the end? Because the way I see it in the stimulus it is said: S -> M -> U (then conclusion S->A) and adding U->A. In (D) we see: M->E->S (then conclusion: M->R) and add S->R. In A it is the same but I chose D because could not understand difference but arbitrary vs. subjectively is close enough too so.
I believe you'll find I address that similarity at about the 0:22 mark of this video. Let me know if you still have questions after checking that out!
At about 0:55 you start discussing the answer choice (D). At 0:22 you discuss the similarity between the stimulus and the (A). However, I still cannot understand why (D) is wrong. Structurally I see it the same. Sorry.
Notice that I have boxed the non-transitive, "shifty" portions of each argument. See that in our argument and in (A), that occurs at the end. In (D), it occurs in the middle. That structural dissimilarity is, to me, the relevant difference.
In our CS introduction, "Smoking is necessary for being cool" is C-S (aka, to be cool, you must smoke). In A, "long hours of practice are necessary for developing musical skill" is P-S. Why are they flipped around? Shouldn't it be S-P (If you want to develop musical skill, you must do long hours of practice)? Or am I missing something? Thank you! :)