पङ्क means mud and प्रक्षालन means to wash. An act of washing mud is called पङ्कप्रक्षालन If our foot slips in mud, it is no problem because a foot that becomes dirty with mud can be washed with clean water. Thus, there is facility of washing out mud. But if we remain vigilent and our foot does not become dirty with mud, it would not be necessary to use water. keeping this truth in view, this kind of Nyaya is thought of.
his kind of Nyaya sermonises, advice at every step. Mosquitoes cause sickness. People generally think that to avoid mosquitoes many kinds of remedies are available and if we fall sick treatment in hospital is available. Consequently, people feel that they will be able to prevent difficulties caused by mosquitoes, we need not worry about it. But this Nyaya advises us aganist that thinking. It advises us to remain quite vigilent from the beginning and see that there are no puddles in monsoon, mosquitoes don't breed and sickness is not experienced. If this is done, we will not need to take steps to avoid difficulties, we will not have to incur unnecessary expenses and we will not have to undergo any pains resulting due to sickness. Thus, we must remain very careful to see that mosquito-terror does not increase in rainy season.
A person, creating difficulties / thinking that remedies are available and then to avoid those difficulties spends his time, energy and money. This can be described very succinctly is though of using this Nyaya terminology i.e. पङ्कप्रक्षालनन्यायः ।