It is also helpful to distinguish belief itself from the elicitation of that belief and also from your introspective access to those beliefs. The same goes for other attitudes (values, utilities and so on). It may be that you have beliefs that are not amenable to (precise) elicitation, in practice or even in principle. Likewise, your introspective access to your own beliefs might be imperfect. Such imperfections could be a source of imprecision. Bradley (2009) distinguishes many distinct sources of imperfect introspection. The imperfection could arise from your unawareness of the prospect in question, the boundedness of your reasoning, ignorance of relevant contingencies, or because of conflict in your evidence or in your values (pp. 240–241). See Bradley and Drechsler (2014) for further discussion of types of uncertainty.