tribhir ityuktam / tatra dvābhyāṃ vyabhicāramupadarśya tṛtīyenāpyākāśena vyabhicāram upadarśayann āha ākāśamapītyādi /
It was [previously] stated that [the probans] is inconclusive due to three [factors]. Having shown the inconclusiveness through two [factors], [the author] now shows the inconclusiveness through the third factor, ākāśa.