 The objections discussed above challenge the sufficiency of the externalist’s proposed conditions for justification. However, even if the above counterexamples to sufficiency are met, we might question whether the externalist’s conditions capture something essential to or necessary for foundational justification, or for the justification of other beliefs on the basis of foundational ones. Is unconditional, belief-independent reliability, for example, really necessary for justification at the foundational level? And is conditional, belief-dependent reliability really necessary for the justification of other beliefs?