I want to know the answer to the following question:
What teaching were criticized by Nagarjuna?
All the background I'm provided with is that "While the Mādhyamaka school held that asserting the existence or non-existence of any ultimately real thing was inappropriate, some exponents of Yogacara asserted that the mind and only the mind is ultimately real (a doctrine known as cittamatra).". Is that enough to answer the question?