4 ms·

You are complecting two problems: 1) When does the other person sleep. 2) What does his watch show. Making 2) easier does not change anything with regard to 1)

• fvirexi 13y ago
  It doesn't change the sleep patterns, but would you say it does not make a difference in judging at which hours other people sleep?
• philwelch 13y ago
  For most people, their sleep is highly correlated with what their watches show.