Q&A for challenges?

Question

I have been using the challenge feature in SoloLearn everyday since I installed the app. I recently asked what people thought of comments / explainations for wrong answers and it was brought to my attention that this would be tedious based on the large question pool. My newly devised idea is a Q&A for questions / or a comment section that is only displayed upon completion for incorrect answers. Yes, you could memorize answers, but you can't learn if you dont understand. What are your thoughts?

Answer 1

+1 for the comments section. It should be moderated, though, in order to discard posts that give the plain answer, IMHO.

Answer 2

Yes that's a great Idea