Nyāya Hetvābhāsa Analysis: Sparrow Argument

The Nyāya system identifies various logical fallacies in arguments, known as hetvābhāsa. These fallacies undermine the validity of an inference.

The argument presented is: "A sparrow is a bird, since it has wings."

Argument Components

• Pakṣa (Subject): Sparrow
• Sādhya (Predicate): Bird
• Hetu (Middle Term/Reason): Having wings

Hetvābhāsa Identification

A Sādhāraṇa-anaikāntika (common strayer) fallacy occurs when the middle term (hetu) is not exclusively related to the major term (sādhya). Specifically, the hetu applies to the pakṣa (sparrow) and is associated with the sādhya (bird), but it is also found in cases where the sādhya is absent (vipakṣa).

In this argument, the reason "having wings" is present in sparrows, which are birds. However, many things that are not birds also possess wings, such as insects. Because the characteristic of "having wings" is not unique to birds and applies to non-birds as well, it cannot definitively prove that a sparrow is a bird.

Therefore, the argument commits the fallacy of Sādhāraṇa-anaikāntika.

Alternative Fallacies Explained

• Svarūpāsiddhi: The middle term itself is not established or existent. This is not the case here, as "wings" clearly exist.
• Āśrayāsiddhi: The subject (pakṣa) of the inference is non-existent. Sparrows exist, so this is not applicable.
• Asādhāraṇa-anaikāntika: The middle term applies only to the subject (pakṣa) and not to any counter-example (vipakṣa). This is the opposite of the current fallacy; "wings" is not exclusive to sparrows.

The logical defect in the given argument is Sādhāraṇa-anaikāntika.