by ManhattanPrepLSAT1 Mon Aug 13, 2012 6:24 pm
There are some particularly repeated forms of flawed argument structures that are very useful for approaching the abstract language common to the answer choices in Flaw questions. However, for weaken questions, the repeated forms comprise a smaller portion of all Weaken questions. Each of those flaws discussed on flaw questions comes up at some point in time on weaken questions as well. But the biggest issues to be on the lookout for on Weaken questions are:
1. Causation (mistaking correlation for causation, failing to rule out an alternative cause, and possibly reversing the causal relationship)
2. Explanations (evidence presents something we witnessed, conclusion offers an explanation for how or why it happened but failed to consider alternative explanations - very similar to causation)
3. Percentages and Numbers (the percentage of something increasing or decreasing does not imply that the amount of something is also increasing or decreasing)
But the most typical approach on Weaken questions is to find what the argument assumes to be true, and attack it.
Good luck!