 Note that the epistemic Evidentialist does not hold that the acquisition of significant truth—even truth that promotes survival—is the only relevant consideration in this region: our belief-forming faculties are not mere thermometers or motion-detectors. The idea is rather that, as evidence-sensitive believers, we don't merely want to believe significant truths; rather, we want to have good grounds for taking propositions to be true, and to base our belief on those grounds (Feldman 2000; though again see David 2001). This putative fact is then taken to underwrite a norm: we ought to seek not just true belief but knowledge, or, more specifically, we ought to seek widespread significant knowledge without widespread significant error. To seek knowledge in this way is, among other things, to seek to have sufficient evidence for true beliefs and to base them on that evidence.