I will approach this from the soteriological angle. There is a dispute between Naiyayikas and Advaitins about the status of the jiva in moksha.
Naiyayikas define the state negatively. i.e. moksha is absence of pain. So, they interpret happiness as *absence of pain*. Unfortunately, for the Naiyayikas, this opens them up to the charge that no one will work towards moksha if all that it offers is an *absence of pain* as opposed to a positive state of *pleasure*. In fact, in moksha, the jiva, as per Nyaya, is without any cognition whatsoever.
The Advaitins argue that the state of moksha is a positive state of pleasure. The Naiyayikas charge them with inconsistency. The syllogism is as follows.
P1. Any desire for pleasure causes karma.
P2. Moksha is a state of pleasure.
C1. Desire for moksha causes karma.
P3. Anything that causes karma makes moksha more distant.
C2. Desire for moksha makes moksha more distant.
Hence, according to the Naiyayika, the Advaitin's moksha is unattainable.
I suggest anyone interested in this dialectic to read
Atmatattvaviveka by Udayana.
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