I was just talking to my wife this morning about underlining or highlighting the WT paragraphs.
When I was 13 years old I would fight with my dad because I refused to highlight the answers.
The reason was because I wanted my comment to be genuine. I felt that highlighting the "answer" made me lean on just using that as a crutch and not truly putting it in my own words.
I still hold that argument now, and I am 26. The only reason you would ever have to highlight something in a study book would be if you needed to remember it, maybe it is fairly complicated or subtle information that could be easily forgotten.
So many times in the WT the "question" has the same phrase that's in the paragraph! It's literally like playing connect the dots.
So what I would do is NOT highlight during the family study. Then when it was read again on the stage, I would have to listen to it again and I would figure out a way to answer it (if I was going to comment) while he was reading. I had to create a comment on the fly.
Highlighting 1 or 2 sentences of a 5-7 sentence paragraph and then psudo-reading it as a comment was not a challenge to me at all once I hit teenagehood.
It really shows that even at a young age, I was questioning the very policy of the WT. I think deep down I knew I didn't want to be a drone. I wanted an intellectual challenge, one that could not be offered by the WTS.