Siddhanta (सिद्धान्तः)

Siddhanta (Samskrit : सिद्धान्तम्) called as Theory or Accepted Conclusions is one of the Shodasa Padarthas defined by Gautama maharshi, the knowledge of which leads one to Nihshreyasa according to Nyaya Darshana. These sixteen things or padarthas are basically used for understanding the components seen in the world. Many concepts of things or activities of the world are propounded as siddhantas, like srsti siddhanta (theory about creation), siddhantas in ganita (mathematical theories) etc. The concept of Siddhanta is very important in the present day world which uses this term widely as "theory" virtually in every context of life.

परिचयः॥ Introduction

The word Siddhanta is made up of two words "siddha and "anta"; of these the word siddha denotes all those things with regard to which people have the idea that "this is so and so," and 'this thing has such and such a character.' The word Anta denotes the conviction or opinion that people have with regard to the particular character of those things.

A proposition or statement of fact asserted in the form "this is so" is called Theory (or Doctrine). This is an "object" of cognition but yet is enunciated separately by itself because it is only when there are a number of different theories, and never otherwise, that the three forms of Debate - Discussion, Disagreement and Arguments become possible.

तन्त्राधिकरणाभ्युपगमसंस्थितिः सिद्धान्तः ॥२६॥ {अभ्युपगमसिद्धान्तलक्षणम्} (Nyay. Sutr. 1.1.26)

tantrādhikaraṇābhyupagamasaṁsthitiḥ siddhāntaḥ ॥26॥{abhyupagamasiddhāntalakṣaṇam}

According to the Vatsyayana Bhashya,

Tantrasamshitihi (तन्त्रासंस्थितिः) means the conviction resting on the direct assertions of tantra (shastra) standing for the teachings in connection with things related with one another. This includes the Sarvatantra and Pratitantra Siddhantas.

Adhikaranasamsthitihi (अधिकरणसंस्थितिः) is the conviction resting on implication and not on direct assertion.

Abhyupagamasamsthitihi (अभ्युपगमसंस्थितिः) is the hypothetical and tentative acceptance of an opinion not duly ascertained.

सः चतुर्विधः सर्वतन्त्रप्रतितन्त्राधिकरणाभ्युपगमसंस्थित्यर्थान्तरभावात्॥२७॥ {तन्त्रभेदौद्देशसूत्रम्} (Nyay. Sutr. 1.1.27)

saḥ caturvidhaḥ sarvatantrapratitantrādhikaraṇābhyupagamasaṁsthityarthāntarabhāvāt॥27॥ {tantrabhēdauddēśasūtram} (Nyay. Sutr. 1.1.27)

There are four distinct kinds of Siddhantas, on account of diversity among the several philosophies. They are Sarvatantra, Pratitantra, Adhikarana and Abhiyupagama Siddhantas.

सर्वतन्त्रसिद्धान्तः ॥ Sarvatantra

A Siddhanta common to all tantras (shastras) is called Sarvatantra Siddhanta. It is that philosophical conviction, or theory, which is not incompatible with any philosophy.

सर्वतन्त्राविरुद्धः तन्त्रे अधिकृतः अर्थः सर्वतन्त्रसिद्धान्तः॥२८॥ {सर्वतन्त्रसिद्धान्तलक्षणम्}

The Vatsayana Bhasya states the examples thus

यथा ध्राणादीनीन्द्रियाणि गन्धा

प्रतितन्त्रसिद्धान्तः॥ Pratitantra

समानतन्त्रसिद्धः परतन्त्रासिद्धः प्रतितन्त्रसिद्धान्तः॥२९॥{प्रतितन्त्रसिद्धान्तलक्षणम्}

अधिकरणसिद्धान्तः॥ Adhikarana

यत्सिद्धौ अन्यप्रकरणसिद्धिः सः अधिकरणसिद्धान्तः॥३०॥ {अधिकरणसिद्धान्तलक्षणम्}

अभ्युपगमसिद्धान्तः॥ Abhyupagama

अपरीक्षिताभ्युपगमात्तद्विशेषपरीक्षणं अभ्युपगमसिद्धान्तः॥३१॥ {अभ्युपगमसिद्धान्तलक्षणम्}