तद्भिन्नत्वे सति तद्बोधकत्वं तटस्थलक्षणत्वम् ।
tad-bhinnatve sati tad-bodhakatvaṁ taṭastha-lakṣaṇatvam |
(Siddhānta-ratna: 8.2)
“Being distinct from it [i.e., an object to be defined] and an indicator of it is the nature of a taṭastha-lakṣaṇa (extrinsic characteristic).”