Follow the curriculum. Strengthening and weakening questions have to do with support, flaw questions have to do with argument mechanics. You don't have to see a flaw to weaken or strengthen an argument.
So, in weakening questions, the author has left his analysis/theory incomplete. With that incomplete theory, he goes on to make a strong conclusion. Hence, there is no reason to believe that the conclusion is supported by the theory.
I struggle with weakening and flaws q's too. ... get the ball rolling (toward weakening the argument in any way ... the most important thing in Weakening/Flaws is to NOT get ...
I'd be really curious to see how you're doing in strengthening questions. When you miss weakening questions, is it because you don't understand the argument? Or do you get messed up at the answer choices?
ASSUMPTIONS & WEAKENING QUESTIONS
ASSUMPTIONS Lesson 1 < ... ARGUMENTS Lesson 6
**On Weakening questions the focus is on ... P or C on every Weakening question.