It really just depends on how much time you personally want to spend on it. For me, I didn't want to overwhelm myself with the content. I am going to be finishing up the CC content in the next week or so, and I started back in February. I recently h…
In the CC there is a lesson about Strengthen vs. PSA vs. SA. (https://7sage.com/lesson/strengthen-psa-sa-questions)
Echoing what @Fighterhao said, strengthen questions just make the argument better, but it doesn't have to make the argument valid.
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