Nagarjuna, a prominent Buddhist philosopher of the Madhyamaka school, is known for his teachings on emptiness and the concept of "shunyata" or emptiness. While his philosophy has been greatly influential in Buddhism, it has also faced criticism from various scholars and philosophers.

One of the main criticisms of Nagarjuna's philosophy is that it is self-defeating and contradictory. This criticism stems from the fact that Nagarjuna's arguments are based on the idea that all things are empty and lack inherent existence. However, by making this claim, Nagarjuna is also implying that his own teachings are empty and lack inherent existence. This creates a paradox and undermines the validity of his arguments.

Another criticism of Nagarjuna's philosophy is that it is overly skeptical and nihilistic. Some argue that by emphasizing the emptiness of all things, Nagarjuna is denying the existence of any meaningful reality. This can lead to a sense of hopelessness and despair, as well as a lack of motivation to engage in positive actions.

Additionally, some critics argue that Nagarjuna's philosophy is too abstract and detached from everyday life. His teachings on emptiness and the concept of "shunyata" can be difficult for ordinary people to understand and apply in their daily lives. This can make his philosophy seem irrelevant and impractical.

Furthermore, some scholars have criticized Nagarjuna for not providing a clear understanding of the relationship between emptiness and conventional reality. While he emphasizes the emptiness of all things, he does not offer a clear explanation of how this relates to the conventional world we experience.

Another criticism of Nagarjuna's philosophy is that it is too dependent on Buddhist doctrine and terminology. This can make it difficult for those outside of the Buddhist tradition to fully understand and engage with his teachings. It also raises questions about the universality of his philosophy and its applicability to other belief systems.

In conclusion, while Nagarjuna's philosophy has been highly influential in Buddhism, it has also faced criticism for being self-defeating, overly skeptical, abstract, and dependent on Buddhist doctrine. Despite these criticisms, Nagarjuna's teachings continue to be studied and debated by scholars and practitioners alike, highlighting the enduring impact of his philosophical contributions.