Below is an extract from an interesting paper written on precisely this topic. It is very concise and descriptive which I thought would be nice to share here. Though a little lengthy, it is amazingly clear how he explains in depth the topic at hand. Daniel Perdue is also the author of best selling book "Debate in Tibetan Buddhism" which is a clear and thorough exposition of the practice and theory of Buddhist logic and epistemology. I have highlighted certain pertinent aspects that I find most interesting:
A paper by Daniel Perdue
Virginia Commonwealth University
The Tibetans were converted to Buddhism beginning in about the seventh century of the Common Era. After their conversion to Buddhism, the kings sent young trainees to Buddhist India to learn Sanskrit, develop a written language for Tibetan, and translate the Buddhist literature of India into Tibetan.
One of the approaches the Tibetans adopted from the Indian Buddhists is a tradition called “the path of reasoning” which employs philosophical debate. In India, the importance of debate was highly valued. Among Tibetan Buddhists, debate has the reputation of being the most effective way of learning the Buddhist doctrine, preparing one to understand clearly the assertions and be able to apply them in meditation to achieve the liberating wisdom. For more than a millennium, the Tibetans preserved and practiced the Indian style of philosophical debate. The Tibetan argument forms were brought over with minor adaptations from the Indian logical forms. In this system of reasoning syllogisms, consisting of a thesis and a reason stated together in a single sentence, and consequences, an argument structurally similar to a syllogism but is merely a logical outflow of an opponent’s own assertions. This paper describes the structure of the Tibetan Buddhist syllogistic form and suggests that, from the point of view of Buddhist religious practice, the central point of Buddhist reasoning and debate is to guide the student to become capable of understanding the profound view leading to liberation.
The paper in full:
http://www.chibs.edu.tw/ch_html/chbj/21/010_perdue_CHBJ_21.pdf Here is a video clip of the going ons at a typical courtyard debate of a monastery:
This Asia Society video below (1 hr, 42 mins) begins with an introduction by Daniel Perdue, showcases four debating Tibetan monks, includes an excellent lecture by Geshe Thupten Jinpa (the star attraction), presents a sample debate between Perdue and Jinpa in English, and ends with an engaging Q&A. Here is Perdue's intro to the tradition:
IntroductionSince the time of the early Buddhist kings, Tibet has enjoyed a rich history of philosophical enquiry and carries this heritage forth today. Buddhism is a "wisdom tradition," meaning that it is based on the realizations or insights of the historical Buddha and that it holds that all suffering and even the suffering of death are related to a failure of wisdom. They hold that one is freed by wisdom, by seeing the nature of things. Philosophical debate is part of this effort. In India, debate was so valued that, if you lost a debate with an opponent, you would have to convert to the view of that opponent. If you cannot defeat a view, then you are compelled to accept it.
The central purposes of Tibetan monastic debate are to defeat misconceptions, to establish a defensible view, and to clear away objections to that view. Debate for the monks of Tibet is not mere academics, but a way of using direct implications from the obvious in order to generate an inference of the non-obvious state of phenomena. The debaters are seeking to understand the nature of reality through careful analysis of the state of existence of ordinary phenomena, the basis of reality. This is the essential purpose for religious debate.
In practice, the usual form is a debate between a Challenger, standing and asking questions, and a Defender, sitting and answering those questions. The attitude is as if the Challenger is respectfully approaching the Defender with a quandary. The dramatic clapping is done by the standing Challenger only, and is used to punctuate the end of the "question," which is an argument in response to the Defender's answer.
In their understanding of the gesture, the right hand represents method, meaning especially the practice of compassion, and the left hand represents wisdom. Bringing the two hands together represents the joining of wisdom and method. At the moment of the clap, you hear the left foot stomp down and that represents slamming shut the door to rebirth in the lower levels. After the simultaneous clap and stomp, the Challenger holds out the left arm of wisdom to keep shut the door to all rebirth. Also, in that gesture, the Challenger uses his right hand to raise up his prayer beads around his left arm. This represents the fulfilment of the efforts of compassion, in lifting up all suffering beings out of the round of rebirth.
The Argument FormsThe Tibetan argument forms were brought over with minor adaptations from the Indian logical forms. In this system of reasoning, two forms of argument are used to defeat wrong conceptions and to support a clear understanding. These are syllogisms, consisting of a thesis and a reason stated together in a single sentence, and consequences, an argument structurally similar to a syllogism but merely a logical outflow of an opponent's assertions. A valid argument may take theform of either a syllogism or a consequence. The form of a syllogism generally used in the Tibetan philosophical literature and in debate consists of a thesis and a reason, both what is to be proven and the proof, in one sentence:
The subject, sound, is an impermanent phenomenon because of being a product.
The minor premise is that sound is a product. The major premise, which is "suppressed," is that all products are impermanent phenomena. And, the thesis/conclusion is that sound is animpermanent phenomenon. When one states a syllogism, it is like a "promise," the person's best effort to speak a true argument.
However, what you generally hear in philosophical debate are consequences, which are not "promises" but are logical implications drawn from the Defender's statements. The Defender is limited to several answers to the Challenger's arguments. These answers include:
(1)"The reason is not established," which is the way of denying the minor premise;
(2) "There is no pervasion," which is the way of denying the major premise; and
(3) "I accept it," meaning that the Defender accepts the argument and the conclusion.
The goal for the Defender is to give a consistent set of responses to the Challenger's arguments without contradicting what he said earlier. When the Defender contradicts earlier claims, the Challenger will shout, "Tsa!" meaning "Finished!" Your earlier claim is finished! If the Defender contradicts the fundamental thesis put forth at the first, the Challenger shouts "Tsa!" three times.
The practice of reasoning and debate is a broad avenue for many. Whether or not the student is bright and rational, the study of reasoning and debate will help. In fact, whether or not one is even a Buddhist, the study of reasoning and debate will help. All of us want to be able to understand better, to assess better the words of others, and to express ourselves more clearly. These skills develop with the practice of debate. From its origins in India, Buddhism has had anappreciation for reasoning and debate skills. The profound purpose of Buddhist debate and reasoning is to clear away a wrong conception of our own natures and thereby to become free of suffering and even death. However, the vast majority of us cannot go directly to the point. So in the effort to get there, the Buddhists have tried to build up reliable tools and procedures.
Reliable tools and procedures are called "reliable" because they help us to understandwhat is factual and accurate, what is real and what is unreal. Thus, the tools used in Buddhist reasoning should apply not only to topics of Buddhist philosophy but also to anything we wish to look into. The actual tools and procedures are simple and elegant, so they are useful to many. The style of Buddhist reasoning and debate provides a useful way of organizing your own thought and words and for assessing the flood of information that is coming our way.
Most fascinating video:
http://asiasociety.org/video/countries/great-debates-tibetan-debate-complete