 Although many of the epistemologists taking part in the debate on epistemic transmission and transmission failure speak of transmission of warrant, rather than justification, they all seem to use the term ‘warrant’ to refer to some kind of epistemic justification. Most epistemologists investigating epistemic transmission and transmission failure—e.g., Wright (2011, 2007, 2004, 2003, 2002 and 1985), Davies (2003a, 2000 and 1998), Dretske (2005), Pryor (2004), Moretti (2012) and Moretti &amp; Piazza (2013)—broadly identify the epistemic property capable of being transmitted with propositional  justification.[3]  Only a few authors explicitly focus on transmission of doxastic justification—e.g., Silins (2005), Davies (2009) and Tucker (2010a and 2010b). In this entry we will follow the majority in discussing transmission and failure of transmission of justification as phenomena primarily pertaining to propositional justification. (See however the supplement on  Transmission of Propositional Justification versus Transmission of Doxastic Justification.)