 Byrne’s main thesis, that self-knowledge is achieved through use of the doxastic schema, rests on two basic claims. The first claim is that it’s independently plausible that we actually use the doxastic schema (as Evans’ remarks suggest). The second claim is that the hypothesis that we use the doxastic schema best explains the special security and asymmetry of self-knowledge. On his proposal, the special epistemic security of self-knowledge is a matter of externalist warrant: the doxastic schema is not only self-verifying but also yields self-ascriptions that are “safe” in that they could not easily have been  false.[6]  The asymmetry of self-knowledge consists in the fact that following this schema will not yield knowledge of others’ states. Reasoning from it’s snowing to you/they believe that it’s snowing will not reliably yield true beliefs about others’ beliefs.