Mistwell said:
Your reading is as strict constructionist as they come
When something says "for instance", to me that means "one example, included in this rule but not limited to just this example, is..." The exception is to reach weapons. And example of a 10' reach weapon is given. There is no reason to believe they mean JUST 10' reach weapons, as that would make no sense at all, and would not be a "for instance".
Well, my understanding of that rule is that without the 10 foot exception, it's possible to close on a character with a longspear without ever provoking an AoO, by approaching on the diagonal - you leave a square 15 feet from the character and enter a square 5 feet from the character. Obviously, at some stage in your movement in analogue terms, you pass through a point which is 10 feet from the opponent... but since the movement is digital, no threatened square is left, and no AoO is provoked.
This doesn't happen for a large creature with a reach weapon - 15
and 20 feet means that at least one threatened square must always be left. Nor for a huge creature, with his inclusive reach of fifteen feet - there are no gaps in the line that can be slipped through.
Frank demonstrated that the same problem exists for exclusive 15 foot reach... but in the core rules, there
isn't anything that has exclusive 15 foot reach.
So the exception was made to close the gap for a 10 foot reach; no exception is necessary for larger numbers, because no gaps exist.
The example given is one instance of "However, Small and Medium creatures wielding reach weapons threaten more squares than a typical creature." So yes, the exception covers more than just a human with a longspear; it also covers a dwarf with a glaive, or a halfling with a guisarme, or a kobold with a ranseur, or any other example of a Small or Medium creature wielding a reach weapon. And in all the examples of Small or Medium creatures wielding a reach weapon - the examples that the exception covers - the reach is 10 feet. Not 15, or 20, or 60.
-Hyp.