dpyad pa gsum gyis dag pa'i lung

scripture that is purified by the three kinds of analysis like sangs rgyas kyi bka' tshad ma, gzhal bya'i gnas gsum char brjod byar ston &, mngon gyur ston pa la are not refuted by perception, and the concealed lkog gyur ston pa la: are not refuted by inference, te very concealed ston pa of scripture are not internally contradictory [IW]