For weaken, my approach is that whatever answer choice I choose is one that the author cannot make a counterargument against. In other words, they would be defenseless. If they can argue with you about your choice, then you have chosen the wrong weakening point.
For strengthening, it is a matter of choosing an answer choice that would make the stimulus make sense and essentially make it complete.
1 comments
For weaken, my approach is that whatever answer choice I choose is one that the author cannot make a counterargument against. In other words, they would be defenseless. If they can argue with you about your choice, then you have chosen the wrong weakening point.
For strengthening, it is a matter of choosing an answer choice that would make the stimulus make sense and essentially make it complete.