Everyone has their tricks for forecasting the viewing conditions, but no one is willing to make a 100 % commitment, because even old-timers of Alishan can't be 100 % confident of seeing the sunrise the next day.
人人自有一套占卜理論，卻都不敢把話說死，因為就算是老阿里山人，對明天的日出依舊沒有十足把握。