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# Samsaya (संशयः)

# Samsaya (संशयः)

# Prayojana (प्रयोजनम्)

# Prayojana (प्रयोजनम्)

# Drsthanta (दृष्टान्तम्)

# Drsthanta (दृष्टान्तः)

# Siddhanta (सिद्धान्तम्)

# [[Siddhanta (सिद्धान्तः)]]

# Avayava (अवयवः)

# [[Pancha Avayavas (पञ्चावयवाः)|Avayava (अवयवः)]]

# Tarka (तर्कः)

# Tarka (तर्कः)

# Nirnaya (निर्णयः)

# Nirnaya (निर्णयः)

# Vada (वादः)

# Vada (वादः)

# Jalpa (जल्पः)

# Jalpa (जल्पः)

# Vitanda (वितण्डा),

# Vitanda (वितण्डा)

# [[Hetvabhasa (हेत्वाभासः)]]  

# [[Hetvabhasa (हेत्वाभासः)]]  

# Chala (छलः)  

# [[Chhala (छलः)]]

# Jati (जातिः)  

# Jati (जातिः)  

# Nigrahasthana (निग्रहस्थानम्)

# Nigrahasthana (निग्रहस्थानम्)

== षोडशपदार्थाः ॥ Sixteen Categories ==

== षोडशपदार्थाः ॥ Sixteen Categories ==

Nyaya expounds the shodasha padarthas or sixteen entities, the knowledge of the real essence (or true character) of which leads one to the ultimate goal. <blockquote>प्रमाणप्रमेयसंशयप्रयोजनदृष्टान्तसिद्धान्तावयवतर्कनिर्णयवादजल्पवितण्डाहेत्वाभासच्छलजातिनिग्रहस्थानानां तत्वज्ञानान्निःश्रेयसाधिगमः ॥१॥ {पदार्थोद्देशसूत्रम्} (Nyaya. Sutr. 1.1.1)<ref name=":4">Nyaya Sutras ([https://sa.wikisource.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%B8%E0%A5%82%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%BE%E0%A4%A3%E0%A4%BF/%E0%A4%85%E0%A4%A7%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%83_%E0%A5%A7/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%A5%E0%A4%AE%E0%A4%AD%E0%A4%BE%E0%A4%97%E0%A4%83 Adhyaya 1 Ahnika 1])</ref></blockquote>They are as follows with reference to pages 22-30 of Reference<ref name=":6">Mm. Ganganatha Jha. (1939) Gautama's Nyayasutras With Vatsyayana Bhashya. Poona : Oriental Book Agency. ([https://archive.org/details/GautamasNyayasutras/page/n20 Page no 20])</ref> and 294-296 of Reference <ref name=":12">Dasgupta, Surendranath. (7th Reprint : 2012) A History of Indian Philosophy. Volume 1. New Delhi : Motilal Banarsidass Publishers Pvt. Ltd.</ref>.

Nyaya expounds the shodasha padarthas or sixteen entities, the knowledge of the real essence (or true character) of which leads one to the ultimate goal. <blockquote>प्रमाणप्रमेयसंशयप्रयोजनदृष्टान्तसिद्धान्तावयवतर्कनिर्णयवादजल्पवितण्डाहेत्वाभासच्छलजातिनिग्रहस्थानानां तत्वज्ञानान्निःश्रेयसाधिगमः ॥१॥ {पदार्थोद्देशसूत्रम्} (Nyaya. Sutr. 1.1.1)<ref name=":4">Nyaya Sutras ([https://sa.wikisource.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%B8%E0%A5%82%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%BE%E0%A4%A3%E0%A4%BF/%E0%A4%85%E0%A4%A7%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%83_%E0%A5%A7/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%A5%E0%A4%AE%E0%A4%AD%E0%A4%BE%E0%A4%97%E0%A4%83 Adhyaya 1 Ahnika 1])</ref></blockquote>They are as discussed as follows with reference to pages 22-30 of Mm. Sri. Ganganatha Jha's translation<ref name=":6">Mm. Ganganatha Jha. (1939) Gautama's Nyayasutras With Vatsyayana Bhashya. Poona : Oriental Book Agency. ([https://archive.org/details/GautamasNyayasutras/page/n20 Page no 20])</ref> and pages 294-296 of Dr. Surendranath Dasgupta's books on Indian Philosophy (Volume 1)<ref name=":12">Dasgupta, Surendranath. (7th Reprint : 2012) A History of Indian Philosophy. Volume 1. New Delhi : Motilal Banarsidass Publishers Pvt. Ltd.</ref>.

; 1. '''प्रमाणम् ॥ Pramana (Perception)''' : It is the instrument of right cognition. Four pramanas accepted by Nyaya are Pratyaksha, Anumana, Upamana and Shabda given by sutra  

; 1. '''प्रमाणम् ॥ Pramana (Perception)''' : It is the instrument of right cognition. Four pramanas accepted by Nyaya are Pratyaksha, Anumana, Upamana and Shabda given by sutra  

; 4. '''प्रयोजनम् ॥ Prayojana (Motive)''' : It is that, on being urged, by which a man has recourse to activity, i.e., with a desire either to obtain or reject a man is motivated into Action. Proyojana or motive is the basis of all reasoning or investigation according to Nyaya. Motive bears upon all living beings, all actions and all shastras.   

; 4. '''प्रयोजनम् ॥ Prayojana (Motive)''' : It is that, on being urged, by which a man has recourse to activity, i.e., with a desire either to obtain or reject a man is motivated into Action. Proyojana or motive is the basis of all reasoning or investigation according to Nyaya. Motive bears upon all living beings, all actions and all shastras.   

<blockquote>यं अर्थं अधिकृत्य प्रवर्तते तत्प्रयोजनम् ॥२४॥{प्रयोजनलक्षणम्} (Nyay. Sutr. 1.1.24)<ref name=":4" /></blockquote>

<blockquote>यं अर्थं अधिकृत्य प्रवर्तते तत्प्रयोजनम् ॥२४॥{प्रयोजनलक्षणम्} (Nyay. Sutr. 1.1.24)<ref name=":4" /></blockquote>

; 5. '''दृष्टान्तम् ॥ Drshtanta (Example)''': It is something that is directly comprehended, without any need for proof and so is self-evident. It is something which cannot fail to be known or perceived. It can be called as object of cognition (Prameya) but is mentioned separately, because Anumana and Shabda pramanas are both dependent upon it for only through a Drsthanta can they explained. Thus Drshtanta forms the basis on which Reasoning proceeds and is required even to demolish an opponent's position and establish one's stand on a theory.  

; 5. '''दृष्टान्तः ॥ Drshtanta (Example)''': It is something that is directly comprehended, without any need for proof and so is self-evident. It is something which cannot fail to be known or perceived. It can be called as object of cognition (Prameya) but is mentioned separately, because Anumana and Shabda pramanas are both dependent upon it for only through a Drsthanta can they explained. Thus Drshtanta forms the basis on which Reasoning proceeds and is required even to demolish an opponent's position and establish one's stand on a theory.  

<blockquote>लौकिकपरीक्षकाणां यस्मिनर्थे बुद्धिसाम्यं सः दृष्टान्तः ॥२५॥ {दृष्टान्तलक्षणम्} (Nyay. Sutr. 1.1.25)<ref name=":4" /></blockquote>

<blockquote>लौकिकपरीक्षकाणां यस्मिनर्थे बुद्धिसाम्यं सः दृष्टान्तः ॥२५॥ {दृष्टान्तलक्षणम्} (Nyay. Sutr. 1.1.25)<ref name=":4" /></blockquote>

; 6. '''सिद्धान्तः ॥ Siddhanta (Theory or Accepted Conclusions)''': [[Siddhanta (सिद्धान्तः)]] A proposition or statement of fact asserted in the form "this is so" is called Theory. This also can be 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.  

; 6. '''सिद्धान्तः ॥ Siddhanta (Theory or Accepted Conclusions)''': [[Siddhanta (सिद्धान्तः)]] A proposition or statement of fact asserted in the form "this is so" is called Theory. This also can be 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.  

<blockquote>तन्त्राधिकरणाभ्युपगमसंस्थितिः सिद्धान्तः ॥२६॥ {अभ्युपगमसिद्धान्तलक्षणम्}  (Nyay. Sutr. 1.1.27)<ref name=":4" /> </blockquote>

<blockquote>तन्त्राधिकरणाभ्युपगमसंस्थितिः सिद्धान्तः ॥२६॥ {अभ्युपगमसिद्धान्तलक्षणम्}  (Nyay. Sutr. 1.1.27)<ref name=":4" /> </blockquote>

; 7. '''अवयवः ॥ Avayavas (Factors of Inference or Premises)''' : When a conclusion has to be made, a number of words or sentences (Statements) have to be used. The [[Pancha Avayavas (पञ्चावयवाः)|Pancha Avayavas (अवयवाः)]] are the 5 types of Statements or Premises that are necessary to prove a certain conclusion are Pratijna and the others which when taken collectively are called as Factors of Inference.  

; 7. '''अवयवः ॥ Avayavas (Factors of Inference or Premises)''' : When a conclusion has to be made, a number of words or sentences (Statements) have to be used. The [[Pancha Avayavas (पञ्चावयवाः)|Pancha Avayavas (अवयवाः)]] are the 5 types of Statements or Premises that are necessary to prove a certain conclusion. They are Pratijna, Hetu, Udaharana, Upanaya and Nigamana which when taken collectively are called as Factors of Inference.  

<blockquote> प्रतिज्ञाहेतूदाहरणोपनयनिगमनानि अवयवाः ॥३२॥ {अवयवौद्देशसूत्रम्} (Nyay. Sutr. 1.1.32)<ref name=":4" /> </blockquote>

<blockquote> प्रतिज्ञाहेतूदाहरणोपनयनिगमनानि अवयवाः ॥३२॥ {अवयवौद्देशसूत्रम्} (Nyay. Sutr. 1.1.32)<ref name=":4" /> </blockquote>

; 8. '''तर्कः ॥ Tarka (Argumentation)''': It leads to the ascertainment of their validity or invalidity and thus helps in the attaining of true knowledge. Though a category of the Prameya it is enunciated separately because along with the Pramana it is of use in Debate, both in establishing one's own position and in demolishing the position of the opponent.<ref name=":6" /> Tarka means the deliberation on an unknown thing to discern its real nature. (Page 360 of Reference <ref name=":12" />).

; 8. '''तर्कः ॥ Tarka (Argumentation)''': It leads to the ascertainment of their validity or invalidity and thus helps in the attaining of true knowledge. Though a category of the Prameya it is enunciated separately because along with the Pramana it is of use in Debate, both in establishing one's own position and in demolishing the position of the opponent.<ref name=":6" /> Tarka means the deliberation on an unknown thing to discern its real nature. (Page 360 of Reference <ref name=":12" />).