), for the non-perception of the jug
is related to the jug and not to the negation of the jug, and no
concomitance is known between the non-perception of the jug and
its non-existence, and when the question of the concomitance of
non-perception with non-existence is brought in, the same difficulty
about the notion of non-existence (_abhava_) which was sought
to be explained will recur again. Negation is therefore to be
admitted as cognized by a separate and independent process
of knowledge. Nyaya however says that the perception of
non-existence (e.g. there is no jug here) is a unitary perception
of one whole, just as any perception of positive existence (e.g.

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there is a jug on the ground) is. Both the knowledge of the
ground as well as the knowledge of the non-existence of the jug
arise there by the same kind of action of the visual organ, and
there is therefore no reason why the knowledge of the ground
should be said to be due to perception, whereas the knowledge of
the negation of the jug on the ground should be said to be due
to a separate process of knowledge. The non-existence of the jug
is taken in the same act as the ground is perceived. The principle
that in order to perceive a thing one should have sense-contact
with it, applies only to positive existents and not to negation or
non-existence. Negation or non-existence can be cognized even
without any sense-contact. Non-existence is not a positive substance,
and hence there cannot be any question here of sense-contact.
It may be urged that if no sense-contact is required
in apprehending negation, one could as well apprehend negation
or non-existence of other places which are far away from him.
To this the reply is that to apprehend negation it is necessary
that the place where it exists must be perceived. We know a
thing and its quality to be different, and yet the quality can only
be taken in association with the thing and it is so in this case as
well. We can apprehend non-existence only through the apprehension
of its locus. In the case when non-existence is said to
be apprehended later on it is really no later apprehension of non-existence
but a memory of non-existence (e.g. of jug) perceived
before along with the perception of the locus of non-existence
(e.g. ground). Negation or non-existence (_abhava_) can thus, according
to Nyaya, generate its cognition just as any positive
existence can do. Negation is not mere negativity or mere
vacuous abs