Here's the master guru J.Y explaining this question. It's a tough one, and it seems like a lot of people thought that the first sentence was the conclusion.
HAH. Had never listened to this one before (I've always gone straight to @"J.Y. Ping" for the sweet sweet soothing sounds) but I think I gotta use it now. Can't get TOO serious about this beloved crap. For real tho.
That question gave me a headache when I first encountered it a long time ago. But @DumbHollywoodActor nailed it. Follow J.Y's principle with negating necessary and negating sufficient when indicators kick in, and you should be fine.
We might! Though the release of the PT explanations might take a little bit since J.Y. has to complete the PT, then make the video for each question, etc etc on top of all the changes currently going on with the site.
Haha @tanes256 I wouldn’t worry about too much Trainer talk. @"J.Y. Ping” has given a full throated endorsement of The Trainer. And Mike Kim’s has given similar endorsements of 7Sage. A whole big family here