Praudhamanorama p197

p197

"num, the substitute aci, and ra": if it is objected: Surely everything that presents itself in its domain should be barred by the substitute ra, because one adheres to the consideration of the class of things to be barred; and likewise it will be stated: 'It is an exception to guṇa, lengthening, and the substitute u'; and thus, without distinction, nuṭ also should be barred by this; then how can there be a conflict of rules, since that is impossible between a general rule and an exception? True; precisely for this reason, the Bhāṣyakāra, having criticized conflict of rules in that part, stated that nuṭ occurs by virtue of the clue provided by "na tisṛcatasṛ"; one should be satisfied with this. Thus end the stems ending in u.