Vitamin A is necessary but within very precise limits. (fediaf.org)
«Endless» mode suffers from the somewhat imprecise controls and the incredibly precise limits on your cones» areas of illumination, but since it isn't the main attraction its flaws are mostly forgivable. (snackbar-games.com)
But the Summers piece got me thinking about the precise limits of Fed policy here. (businessinsider.com)