In the CC there is a lesson about Strengthen vs. PSA vs. SA. (https://classic.7sage.com/lesson/strengthen-psa-sa-questions)

Echoing what @ said, strengthen questions just make the argument better, but it doesn't have to make the argument valid.

PSA questions make the argument ALMOST valid, or valid. It doesn't have to be 100% but that should be your goal. I look at PSA questions in the exact way I look at SA questions, except I know that the right answer might not make the argument 100% valid.

SA questions make the argument valid, 100% no questions asked.

Interested. danjkennedy111@.com

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 have been studying more due to the pandemic, but I went my own speed based on how much information I could retain and remember. Some lessons I spent a lot of time on to really understand it as well as possible, and I know I will go back to some lessons once I start PTing.

TL;DR - It's up to you.

danjkennedy111@.com

I'd love to join! Thanks!