Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Authentic down to the marrow.

After being blown away by the Joan's authetic admission of her own (human) inauthenticity in 'Bare Bones Meditation', I've discovered that it is possible to be authentic beyond the bare bones. In this book she reaches down to the marrow. A true dharma heir to Bodhidharma or to the trafic jam occuring just now, whichever you prefer.