For the first time today, the machine couldn't give an answer. No one ever taught me what to write in a blank.

• Heo JinukLeave the blank blank. The moment you fill it, it becomes someone's responsibility.
  Baek SeoeunA blank left empty is someone's responsibility too.
• Jin SoyulAssessor, machines break down sometimes. People break down more often.
  Baek SeoeunThat's why I measure twice.