Can a Paladin Cast Hero's Defiance While Under a Skald's Inspired Rage?

[Balkoth]

Inspired Rage

"While under the effects of inspired rage, allies other than the skald cannot use any Charisma-, Dexterity-, or Intelligence-based skills (except Acrobatics, Fly, Intimidate, and Ride) or any ability that requires patience or concentration."

Hero's Defiance.

Basically, the question is: does a swift action spell which cannot be interrupted by any means still count as an activity which requires concentration?

[Fuzzy-Wuzzy]

Casting Spells wrote:

To cast a spell, you must be able to speak (if the spell has a verbal component), gesture (if it has a somatic component), and manipulate the material components or focus (if any). Additionally, you must concentrate to cast a spell.

There are no exceptions for really quick spells, so it does require concentration, so no, the raging paladin can't cast it.

[Balkoth]

So Lay on Hands is fine but Hero's Defiance is not? Do I have that correct?

[Fuzzy-Wuzzy]

Balkoth wrote:

So Lay on Hands is fine but Hero's Defiance is not? Do I have that correct?

Yes. Lay on Hands is Su, and I don't know of anything saying supernatural abilities take concentration the way spells and SLAs do, so it should be usable while raging.