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Brunnholzl makes another point that makes things convenient for a Kagyu Shentongpa like me, which is that…
(p.69)Virtually all Kagyu masters hold the tathagata heart teaching on buddha nature to be of definitive meaning and deny that the tathagata heart is just sheer emptiness or a non implicative negation.
Up until now I had known that specific prominent Karma Kagyu lamas were Shentongpas, but I couldn't connect the dots and make the generalization like Brunnholzl does. However that being said, I think his statement should probably be limited to Karma Kagyupas.
(N.B. this is in the Kagyu sub-forum)