"The central thing I have aimed to argue for in this chapter is that once you have met your obligation towards reflection, it is impossible for you to have not met your doxastic obligation. This ultimately means that the only relevant duties towards beliefs are our duties to reflect. This is because only by reflecting you will know both what you think you ought to believe and what you ought to believe/what you can non-culpably believe."
January 1, 1970
https://en.wikiquote.org/wiki/Intellectual_responsibility