TimSmith said:
True- but a ranger is the "stealth specialist" in the wilderness vs the rogue's stealth speciality in urban/dungeons, so one might expect their skils to be on a par in this matter. The paladin is not merely a militant cleric, however, but more of a holy fighter, so we are in danger of comparing apples with oranges.
I think the example has merit (of course I
would, since I posted it.

) Both cast spells, and one class gets those spells
very late. It doesn't make them any more powerful. As a rule, a later ability does not need to be more powerful than an early one, and classes can get the
same ability at unequal levels, without the power level being affected at all.
Back to the HIPS vs TS debate, I feel liquid sabre's examples make the point excellently. TS cannot see the ranger as it is not xray vision. However, shadows have no substance so the (su) ability of the dancer to HIPS is inevitably using some form of magic/illusion/misdirection/concealment to allow them to hide. I don't see how the intent can be anything but this,
My point, and thus my stance, is that
True Seeing does not negate all magical concealment, nor all magical misdirection. It ignores the concealment granted by darkness or magical darkness. HiPS requires shadows be present, it does not depend on the concealment of those shadows to function. It's just as possible that the Shadowdancer shifts partially into the Plane of Shadow, just enough to have his visible form flicker out of view for a bit. Does
True Seeing thwart this? Not at all.
You could also envision the Shadowdancer as drawing on the substance of the Plane of Shadow to create a small "smoke-bomb" of quasi-real Shadow stuff. Just as the Shadow Conjuration/Evocation spells can create objects and creatures that are 20% real, so too would this "shadow smoke" be 20% real. But that's enough to foil TS, which cannot penetrate fog-like barriers,
including magical ones, so long as they are actually Conjurations, and not Illusions.
If the DM rules that HiPS is dependent on the shadows actually providing concealment (which would be a narrower view than the ability description itself supports, but not entirely unfounded and certainly fitting with the flavor of the class,) then yes, one could further rule that, because HiPS requires the concealment of the shadows, and that concealment is negated by
True Seeing, then HiPS is trumped by TS.
I don't believe HiPS is dependent on the concealment of the shadows, and therefore it is not thwarted by
True Seeing.
especially as the ability is specifically a supernatural and therefore magical one. (If this is where the disagreement is arising, then I would be interested to hear how those with differing views imagine the dancer making use of their ability-ie what does the dancer actually do in order to HIPS?)
I mentioned a possible description above, but note that I do not think the magical nature of HiPS (which is beyond dispute, really. Sure, the ability allows mundane hiding, but it's a
magical ability that allows mundane hiding,) is itself enough to render it vulnerable to TS. TS does not foil any magical deception. It's very specific on those magical deceptions that are vulnerable to it.