Nagarjuna relies on a form of argument which is based heavily on 1. dharmas
2. catuskoti
3. belief
4. Poetry

2. Catuṣkoṭi

Explanation:

Nagarjuna was an Indian thinker and a Buddhist philosopher who founded the Madhyamaka school of Mahayana Buddhism. He was born to a family of the Brahmin class in Hinduism but later on, he became a Buddhist.

He relied on the logical argument called "Catuṣkoṭi," which tackled on 4 corners or circles:

It became a way of learning and investigating. It also had a huge impact on the Buddhist logic.

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