Praudhamanorama p40

p40

In mentions of abbreviatory designations, secondary signification is firmly established with respect to that which is denoted by what is denoted by them, because of the inferential marker "dīrghājjasi ca" (Pā. sū. 6.1.105) and the explicit mention "lvādibhyaḥ" (Pā. sū. 8.2.44). Therefore, by the word *ik*, sixty-six [sounds] are grasped, and by the word *yaṇ*, seven. Even though, being produced as substitutes, they do not grasp homogeneous sounds, because phonetic qualities do not cause difference, the nasalized forms of *y*, *v*, and *l* are also grasped. Therefore, numerical correspondence does not apply. Nor should one say that let there be numerical correspondence by taking the primary cognitive apprehension that precedes the apprehension of the secondary meaning. For even then, when thirty [varieties] each are presented by the third and fourth, *ṛ-kāra* and *ḷ-kāra*, it would entail that the substitute *r* would apply to the varieties of *ḷ*, and the substitute *l* to the varieties of *ṛ*. Therefore, intending that the desired result here is established only by the rule "sthāne'ntaratamaḥ" (Pā. sū. 1.1.50), he says: "on account of proximity in place of articulation".
anaci ca (Pāṇini-sūtra 8.4.47)