Write a note on the concept and types of hetvabhasa in Nyaya Philosophy.
Write a note on the concept and types of hetvabhasa in Nyaya Philosophy.
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In Nyaya philosophy, "hetvabhasa" refers to fallacious or invalid reasoning, where the inference (anumana) is vitiated by a flaw in the middle term (hetu). Hetvabhasa occurs when the hetu, which is supposed to establish the connection between the minor term (paksha) and the major term (sadhya) in an inference, is faulty or inadequate. Nyaya philosophers meticulously analyze and categorize hetvabhasa to ensure the validity of reasoning and prevent errors in inference.
There are five main types of hetvabhasa in Nyaya philosophy:
Sadhyasama (Partial Concomitance): This occurs when the middle term (hetu) has only partial concomitance with the major term (sadhya). In other words, the hetu is associated with both the presence and absence of the major term. For example, if smoke is the hetu for inferring fire, but there are instances where smoke is present without fire (e.g., in a smoke machine), sadhyasama occurs.
Viruddha (Contradictory): Viruddha hetvabhasa arises when the middle term contradicts the presence of the major term. If the hetu indicates the absence of the major term in the subject, but the major term is present, the inference is vitiated. For instance, inferring the absence of fire in a kitchen based on the absence of smoke would be viruddha hetvabhasa.
Asiddha (Unestablished): Asiddha hetvabhasa occurs when the middle term (hetu) is itself unestablished or unproven. If the connection between the hetu and the major term is not demonstrated or accepted, the inference lacks a valid foundation. For example, inferring the presence of fire from the sound of a drum (hetu) without establishing a connection is asiddha hetvabhasa.
Satpratipaksha (Counter-positive): In this type of hetvabhasa, the counter-positive of the hetu is used to establish the inference. This occurs when the hetu is said to be present in the absence of the minor term, but the counter-positive of the hetu is not established. For instance, inferring the absence of fire in a kitchen based on the absence of smoke everywhere else is satpratipaksha hetvabhasa.
Equivocation (Bhranti): Equivocation hetvabhasa involves a misleading middle term that is related to both the major and minor terms but in different senses. The ambiguity in the meaning of the middle term leads to an erroneous inference. For example, inferring the absence of fire based on the statement that there is no fire in the mountain (where fire refers to a jewel named "fire") is bhranti hetvabhasa.
Nyaya philosophers, through the analysis of hetvabhasa, aim to establish a rigorous and sound system of inference, ensuring that reasoning is free from fallacies and capable of providing valid knowledge about the world.