... BIBLE and watching JY's logic lessons are sufficient for you ... fully grasp the understanding of formallogic for the LSAT. For the ... think reading a book on FormalLogic might be helpful to read ...
I read a lot of formallogic in college since I studied philosophy. I believe it helped me skip (or watch at high speed) some logic videos here. I wouldn't recommend formallogic books to someone who has the videos here.
I thinks that logic games are good to repeat. That's what I do, and the games which I have not done for a couple of months are like new to me. On LR, probably assumption questions, and any formallogic questions are ok to repeat.
The difference is in the title. Must be true questions rely heavily on formallogic and the answer choice must be true. MSS questions do not have to be true, but they must be strongly supported.
And one more question, where can I find a list of terms that I can memorize for these formallogic conditions, (e.g. If/then, if and only if, if but only if, if yet only if, unless, not unless, etc.etc)