Strategy for Weaken/Strengthen Questions

ilanjacobowitz

I have heard people say that using the "and" and "but" strategy for weaken/strengthen questions really helps them arrive at the right answer. The strategy is basically that when you are asked to strengthen the argument, you say "and" at the beginning of each AC, and when you are asked to weaken the argument, you say "but" at the beginning of each AC. People say this has been a "life changing" strategy for them, but I'm still confused on how this helps people discern which answer is correct. If you use this strategy, could you please elaborate on how you use it (perhaps with an example)?