Hi Bartho,

I'm not sure if your questions are really about the study plan or the GMAT content/patterns/tactics that you need to learn. If you have questions about the study plan, then you should post them here:

https://www.beatthegmat.com/the-60-day-g ... e-f60.html

When it comes to CR questions, there are a variety of tactics that you can use to get to the correct answer. Here are some things to remember though:
1) CR questions are always very carefully worded, so pay attention to the details.
2) CR questions are almost always based on a logical pattern of some kind (e.g.. causality - the idea that one thing causes another to happen).
3) Specific CR questions ask you to do specific things, but the work that you have to do (note-taking, linking ideas, etc.) is often similar from question to question.

In the example you noted, to "weaken" an argument, you have to understand the 'logic' behind the argument, then think about how you can ATTACK the logic (and then find an answer that matches/attacks the prompt).

For sentence corrections, a combination of grammar knowledge and pattern-recognition is usually required. Answer A is always a "copy" of what appears in the prompt and it tends to be the correct answer only about 20% of the time. So you have to look for clues in the NON-underlined portion of the sentence to help you figure out how the underlined portion should be written.

GMAT assassins aren't born, they're made,
Rich