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Upamāna and Arthāpatti
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Upamāna, Arthāpatti. Analogy (upamāna) is accepted by Mimāmsā in a sense which is different from that in which Nyāya took it. The man who has seen a cow (go) goes to the forest and sees a wild ox (gavaya), and apprehends the similarity of the gavaya with the go, and then cognizes the similarity of the go (which is not within the limits of his perception then) with the gavaya. The cognition of this similarity of the gavaya in the go, as it follows directly from the perception of the similarity of the go in the gavaya, is called upamāna (analogy). It is regarded as a separate pramāna, because by it we can apprehend the similarity existing in a thing which is not perceived at the moment. It is not mere remembrance, for at the time the go was seen the gavaya was not seen, and hence the similarity also was not seen, and what was not seen could not be remembered. The difference of Prabhākara and Kumārila on this point is that while the latter regards similarity as only a quality consisting in the fact of more than one object having the same set of qualities, the former regards it as a distinct category.
Arthāpatti (implication) is a new pramāna which is admitted by the Mimāmsā. Thus when we know that a person Devadatta is alive and perceive that he is not in the house, we cannot reconcile these two facts, viz. his remaining alive and his not being in the house without presuming his existence somewhere outside the house, and this method of cognizing the existence of Devadatta outside the house is called arthāpatti (presumption or implication).
The exact psychological analysis of the mind in this arthāpatti cognition is a matter on which Prabhākara and Kumārila disagree. Prabhākara holds that when a man knows that Devadatta habitually resides in his house but yet does not find him there, his knowledge that Devadatta is living (though acquired previously by some other means of proof) is made doubtful, and the cause of this doubt is that he does not find Devadatta at his house. The absence of Devadatta from the house is not the cause of implication, but it throws into doubt the very existence of Devadatta, and thus forces us to imagine that Devadatta must remain somewhere outside. That can only be found by implication, without the hypothesis of which the doubt cannot be removed. The mere absence of Devadatta from the house is not enough for