 These theories understand evidential justification in terms of reliability. One could alternatively understand it in teleological terms (Plantinga 1993) and couple this with a requirement that every justified perceptual belief be based on some appropriate experiential evidence (although teleological theories tend not to take this extra step). Either way, we get a theory that solves some of the Sellarsian problems for seemings internalism. The reliability or teleology can determine which experiences serve as proper evidence for which beliefs, and it shouldn’t matter whether experiences have the right kind of content, or any content at all. The external factor thus plays roughly the same role as internalized know-how does for Markie’s view. Like Markie’s view, externalist theories of perceptual evidence violate evidence essentialism, but unlike that view, they retain the objectivity of evidence, even if the teleological views see it as species-relative.