 There have been a number of attempts to respond to such cases. One response is defended by Bergmann (2006: ch. 1 and 2) and was already discussed above in connection with regress problems for access internalism  (section 3.1).  Proponents of the objection often claim that what the cases suggest is that there must be something the subject is aware of or has access to that makes a difference to his perspective on the truth or appropriateness of the belief. Bergmann argues that this requirement, as tempting or intuitive as it may be, leads to serious regress problems. (For some replies on behalf of internalism, see Rogers and Matheson 2011, Hasan 2011, and Fales 2014.)