Original
यत्तु बाह्येन्द्रियत्वादि प्राप्यकारित्वसाधनम् ।
अन्यधर्मविजातीयाद्विरोधाद्व्यभिचारि तत् ॥ २५२८ ॥yattu bāhyendriyatvādi prāpyakāritvasādhanam |
anyadharmavijātīyādvirodhādvyabhicāri tat || 2528 ||The reason that is put forward, in the form ‘because they are external organs’,—in support of the view that the organs in question are operative by contact,—is ‘fallacious’ (inconclusive); because it is unlike their other properties and hence there is contradiction (incompatibility).—(2528)
Kamalaśīla
The meaning is clear.—(2528)