Carr, J. Don't Stop Believing, 2014. URL: http://web.mit.edu/jrcarr/www/pdfs/dontstopbelieving.pdf Christensen, D. “Diachronic Coherence Versus Epistemic Impartiality.” Philosophical Review 109 (2000): 349–71. Hedden, B. Reasons Without Persons: Rationality, Identity, and Time. Oxford: Oxford University Press, 2015. Hedden, B.. “Time-Slice Rationality.” Mind (2015). Epub March 12, 2015. Turri, J. “On the Relationship Between Propositional and Doxastic Justification.” Philosophy and Phenomenological Research 80 (2010): 312–26. Whitehead, A. N. and B. Russell. Principia Mathematica. 2nd ed. Cambridge: Cambridge University Press, 1963.