Quote Originally Posted by Glome View Post
To understand why Parson can use the portals, one has to consider that nobody has to actually cast a spell to use the portals, they just use them. So if only spellcasters can use the portals, it is because the portals themselves stop anyone else from using them. Yet Parson's stats are invisible, nobody know who or what he is, probably not even the portals. It is this invisibility as a unit that probably allowed Parson to use teleporters designed only for casters.
Or it could be that the inferred "only casters can use the portals" rule is a "not allowed" thing rather than a "not physically possible" thing (i.e. the portals will work for a non-caster, but the powers that be in the Magic Kingdom will take strong exception to the presence of a non-caster). If so, going through the portal as a desperation measure and worrying about that problem later makes sense.