k_short_term_mem_challenge

— operational risk 1: forget to bring Rev card when needed

This risk is more likely than risk 2.

Therefore, I will use Rev card to buy a new one, when I bring a “single-ticket” movie card to GV.

— operational risk 2: too many unfinished high-value movie cards, leading to “misplacement at home”

I think … 3… is still tolerable.

Better reduce the remaining values.

— operational risk: forget to bring movie card, but I won’t discuss it here.