Consensus of Reality
Consensus: But generally speaking, there is a consensus of what these basic laws of logic and reality and physics and nature are. The consensus has within it the meta-consensus that consensuses exist and generally hold true for people across the world and that they won’t change, even if there may occasionally be exceptions. This consensus derives naturally from the way sentient beings perceive the world and strive to make sense out of it, and strive to see patterns in the chaos of reality. The ‘Foundation of reality’ of faith is itself a consensus, though in this case it is maintained by those at the top of their sects (those alone know this truth of truths) and buttressed by the work of all the mages and priests of the world, even if they’re not aware of the Foundation, for all their magic is based on it. And because faith is part of the consensus, it is how reality in the world of Faith works, even if the vast majority of people don’t know about it; faith itself is thus is a self-perpetuating faith, circular reasoning to the extreme.
Fringe and Paradox: The consensus only exists for things that are at the core of the sentient experience; so this includes all the physics that people readily see and interact with, but not for the more arcane things, such as general relativity or even the flatness of the earth. And in all these ‘fringe’ areas where there is no consensus, there are consequently no objective laws of reality, and anything can happen, or rather, observers can observe contradictory things. For example, the roundness of the world is not readily apparent to all; some people who set out to determine whether the world is round, will find it to be round; while others will find it to be flat; they will have mutually impossible observations, based on their faith, and draw mutually exclusive conclusions from them. And even attempts to spread the knowledge of it will generally be unsuccessful; even if someone were to tell all the world that the world were round, for example, there would still be people who disbelieve it, or who are ignorant of it; and in disbelieving the roundness of the world, they can sail off the edge of the world into an abyss.