Pluralistic ignorance
In social psychology, pluralistic ignorance is a situation in which a majority of group members privately reject a norm, but go along with it because they incorrectly assume that most others accept it. This is also described as "no one believes, but everyone thinks that everyone believes". In short, pluralistic ignorance is a bias about a social group, held by the members of that social group.
Holly Martin Smith
Smith explored how to assess an agent's degree of credit or blameworthiness for an action when the agent acts from a mixture of good and bad motives. She worked on the question of whether an agent is blameworthy for a wrongful act done in culpable ignorance. Her most noted paper is “Culpable Ignorance,” which was named by "The Philosopher’s Annual" as one of the ten best articles in 1983. It analysed in detail the terms of the debate between those who argue that a person is blameworthy for an action performed in culpable ignorance, versus those who hold that while a person is blameworthy for the initial dereliction of failing to acquire information, that does not taint a subsequent action, done in culpable ignorance, that is itself done from acceptable motives.