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Verse 87
The validity of the knowledge depends on whether there is agreement or disagreement with the corresponding external object (bahyārtha):
बुद्धिशब्दप्रमाणत्वं बाह्यार्थे सति नासति । सत्यानृतव्यवस्थैवं युज्यतेऽर्थाप्त्यनाप्तिषु ॥८७॥
सामान्यार्थ - बुद्धि और शब्द में प्रमाणता बाह्य अर्थ के होने पर होती है, बाह्य अर्थ के अभाव में नहीं। बाह्य अर्थ की प्राप्ति होने पर सत्य की व्यवस्था और बाह्य अर्थ की प्राप्ति न होने पर असत्य की व्यवस्था की जाती है।
The piece of cognition (buddhi) and the word (sabda) can be sources of valid knowledge (pramāņa) only when the external objects (bāhyārtha) corresponding to these exist; not when there is absence of the corresponding external objects. Truth is established on the existence of the corresponding external objects (of the piece of cognition and the word), and untruth when the external objects are absent.
Two kinds of sources of valid knowledge (pramāņa) can be thought of: one, used for self through the piece of cognition (buddhi), and two, used for others through the word (sabda). These two can be considered authentic only when there is existence of the corresponding external objects (bahyārtha).
The existence of the corresponding external objects (bahyārtha) establishes the authenticity of the speaker (vaktā), the hearer (śrotā), and the subject (pramātā) and also of the piece of cognition (bodha), the uttered sentence (vākya), and the valid knowledge (pramā). The corresponding external object (bahyārtha) of the word 'jīva' (soul) is thus established
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