because they know their teacher would not get suspicious when they got high grades and they want to get the perfect mark
they cheated because they want to get higher grades
in economics and game theory, global games are games of incomplete information where players receive possibly-correlated signals of the underlying state of the world. global games were originally defined by carlsson and van damme 1993
it's generally relaxing.
picnics are a great way to relieve stress and just to have fun. naturally, people who do picnics tend to bring something to eat. sometimes, we bring board games that will kill time and just have a nice day. picnics are great.