It is shown that one cannot always construct a definition of players' information in the manner of Bonanno (1992) or Battigalli and Bonanno (1997) which conveys true information, is consistent with existing information sets and expresses maximum information

It is argued that if an out-of-equilibrium player observing a deviation from a presumed strategically stable path of play believes that a player also observing the deviation is more likely to deviate than a player who does not observe the deviation then it is possible to justify, in some...