  Three possibilities remain for the development of FA theory, which correspond to its main versions. First, generic FA theories aspire to give a non-circular account of value generally. They therefore need to claim that the broad pro and con attitudes utilized by the theory to explicate good and bad do not already involve those very concepts. Second, although sensibility theory too aspires to elucidate all value, it eschews the ambition to give a non-circular account. The question then becomes whether a circular account really can be informative and, hence, not vicious. Third, a sentimentalist theory can be more modest about how broadly the account applies, but it needs to give an account of the sentiments on which they do not contain those evaluative concepts analyzed—for instance, an account of amusement that can be characterized independently of thinking something funny. Finally, all FA theories have to solve the wrong kind of reason problem, in order to fix on those considerations for or against evaluative attitudes that are relevant to the value of their objects. 