In the text named Shri Mahãbala Tantra Rãja ( King of Tantra named as the great Power), Sakyamuni Buddha has very clearly stated that his followers should accept his teachings given in the framework of the three Turnings of the Wheel of Dharma based on valid reasoning and scientific reason like a goldsmith experimenting gold by cutting, melting and scratching.
Following this statement of Buddha, the great Indian Mahãyãni Buddhist Philosopher Āchãrya Nãgarjuna (150- 250 CE) wrote commentarial texts “The Three Major Collections” for scientific analysis and interpretation of the teachings of the Buddha imparted in the frameworks of the Three Turnings of the Wheels of Dharma. Later Āchãrya Dignãga (5th -6th CE) introduced Buddhist Logics or Dialectical System for analytical study of Buddhism in his book named Nyãyi Pravesh Nãma ( Entering Towards Valid Reasoning). In this very text, he has prescribed eight techniques of engaging in dialectical ways of studies. They are: Direct cognition and inferential cognition; Of both seemingly and non-seemingly is meant to comprehend for oneself; Refutation and assertion of both seemingly and non-seemingly; Is meant to make other comprehended.
Acharya Dignang wrote nearly one hundred and eight short texts compiled into one book called Pramãna Samuchaya (Compendium of Valid Reasoning). where he established every point regarding the teachings of Buddha through dialectical manner. His tradition was followed by his disciple named as Āchãrya Dharma Kriti (6th-7th CE), who wrote seven commentarial texts on Pramãna Sammuchaya. Thus Buddhist Logics or Dialectical System came into existence in India.
Later in Tibet, when the texts like Pramãna Samuchaya, Pramãna Vartik kãrikã and other Buddhist Logic Texts were translated into Tibetan Language, Buddhist Logics and Dialectical system played a dominant role in learning and studying Buddhism in the Tibetan monastic system.The Indian tradition of Buddhist Logics and Dialectical System initiated by Āchãrya Dharmottara and Āchãrya Pragyãkãr Gupta influenced all the four major Tibetan Buddhist Traditions to a great extent. Particularly, the great Tibetan Master named as Bikkshu Chapa Chos Kyi Sangye (1109-1169 CE), made the Dialectical System mandatory in learning Buddhism in Buddhist Monastic Institution in Tibet. He even framed a new syllabus entitled as Bsdus Grata in Tibetan (Eight Segments of Dialectical Techniques) to learn Buddhism through Dialectical manner.
Dialectical system is used as a tool to understand Buddhism scientifically, as it directly helps in obtaining clarity, fastness, profundity and sharpness in vision and intelligence and gradually minimizes/ eradicates the lopsided based misconceptions about the mystery of life. So it is very much practiced at Central Institute of Buddhist Sudies, ( Deemed to be University).