Study note chaos: someone's exam outline fell apart in real time

A handwritten study note on a pink slip of paper, sitting on top of what looks like a textbook or handout. The note reads:

'Check page 67'

응 여기 (Yep, here)

1. Aspects of social culture

2. Problems and benefits of globalization

3. ← not yet lol

Then someone else (or the same person later) wrote back:

'Out of 20, one is missing'

And the final response at the bottom:

'What?? That's ALL of them'

(crossed out) 'I'm pretty sure I got them all'