rule · _guidelines/spec/6.5 · s-ydzyh9nqm3x64h4
A reason gives its grounds and nothing more
Checkedconfirmed by its owner
A reason states the ground its rule rests on, as a rule in its first sentence. Beyond that ground, a reason carries only a caveat for a case the ground does not reach, and further grounds that do not overlap it; what a mistake would cost and a restatement of the rule's text are left out.
Why
Whatever a reason says beyond its grounds blurs them, until a reader can no longer tell which sentence the rule rests on. And a rule held up by grounds that do not overlap survives any one of them going stale.
