The feeling of having the same comprehension is 90 percent of what you want anyway, if you haven't had problems with failing eg school assignments.
I don't think that's the case. I frequently read in order to learn something and not in order to feel like learning something.
How regularly do you apply what you learned? Of the last 10 books you've read, have you used something from each of them?
If you're applying what you've learned, and it seems to work, that's how you know you haven't lost comprehension. If you're not applying what you've learned, it doesn't matter that much either way.
Previous Open Thread: http://lesswrong.com/r/discussion/lw/k94/open_thread_may_19_25_2014/
You know the drill - If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should start on Monday, and end on Sunday.
4. Open Threads should be posted in Discussion, and not Main.