by ohthatpatrick Fri Sep 09, 2011 2:42 pm
Great explanation. You really used your understanding of the nuanced meaning in the premise, both to identify how the correct answer cemented together the argument and how choice (A) still left wiggle room for doubting the conclusion, thereby making it incorrect.
When I was first introduced to LSAT, I read all these in a similar way ... i.e., for the real meaning of what was being talked about.
Nowadays, this is how I mentally process a Sufficient Assumption question such as this one:
1. Task - prove the conclusion
2. What's the conclusion?
"photographs are interpretations of reality"
3. What terms in the conclusion are Familiar, and what terms are New?
Familiar - 'photographs'
New - 'interpretations of reality'
(if there is a New Term in the conclusion, that term, or some equivalent paraphrase, MUST be a part of the correct answer)
4. What terms/phrases are Linked to the Familiar Term in the evidence?
'photographs' - express the photographer's worldview
5. What logical link do I need to connect Prem to Conc?
express worldview --> Interpret Reality
(the common form to SA questions is that there is a New Term in the conclusion and a Familiar Term. The Familiar Term is linked in the premise to some idea, or some chain of ideas. The correct answer will take that final Linked Idea and join it to the New Term ... with CONDITIONAL STRENGTH!)
6. Scan answers looking for ones that relate "express worldview" to "interpret reality", and then verify the proper direction of logic.
(B) and (D) both have the right ideas.
Choice (D) would be symbolized
Interpret reality --> Express worldview
i.e.
Conclusion --> Premise
Any time an answer begins "If the conclusion is true ...", you know it's bad. Our job on this test is to prove or evaluate conclusions, never to assume already that they're true.
Choice (B) would be symbolized
Express worldview --> Interpret Reality
i.e.
Premise --> Conclusion
(Note the similarity to the way we represent the argument Core)
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Points of clarification
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-When deciding on "interpretations of reality" as New Term, I asked myself, "well the author did mention 'representing reality' is the premise. Is that equivalent to 'interpreting reality'? No. Representing and Interpreting are different.
-When asking myself "what terms/phrases are Linked to the Familiar Term?", I only listed that photographs 'express worldview'. I also considered the disclaimer idea of 'whether or not they represent reality', but it's such a wishy-washy idea, that it doesn't seem like the stable, defining Linked Idea I'm looking for.
- Choice (A) I would have eliminated because it doesn't have the phrase "interpretation of reality", so I know it would never allow me to prove that idea in the conclusion. It does refer to interpreting subjects, but the wishy-washy weakness of the claim would turn me off.
(98.5% of the correct answers to Sufficient Assumption are of conditional strength.)
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Long response, I know ... I just wanted to show you how robotically I think of Sufficient Assumption questions, to let you know that they lend themselves to a very systematic process. The vast majority of them are basically Math problems with words and phrases as the numbers/variables.
Premise Idea(s) + Answer Choice = Conclusion