So far I have not said much about objectivity, though earlier chapters have had a good deal to do with it. If an Archimedean point could be found and practical reason, or human interests, could be shown to involve a determinate ethical outlook, then ethical thought would be objective, in the sense that it would have been given an objective foundation. Those are possibilities—or they might have turned out to be possibilities—within the perspective of practical reason. Very often, however, discussions of objectivity come into moral philosophy from a different starting point, from an interest in comparing ethical beliefs with knowledge and claims to truth of other kinds, for instance with scientific beliefs. Here a rather different conception of objectivity is involved. It is naturally associated with such questions as what can make ethical beliefs true, and whether there is any ethical knowledge. It is in this field of comparisons that various distinctions between fact and value are located.