Familiarity Is Not the Same as Understanding

A useful lesson from thinking about study routines: recognizing an idea is weaker evidence of understanding than being able to explain it. A page can look familiar while the important question is still unanswered.

One small review loop makes that gap visible: close the notes, explain one idea in your own words, and write down the exact point where the explanation gets vague. Then return to that part—not the whole chapter. The unclear sentence becomes a more useful guide than another full reread.

This is a thought experiment, not a rule for every subject. Some material needs practice, discussion, or time to settle. But when review feels busy without showing what you know, one honest question can give the next study session a clearer starting point.