kathaṃ trirūpaliṅgajatvamantareṇāsyānumāne 'ntarbhāva ityāśaṅkya trirūpaliṅgajanyatvaṃ pratipādayannāha trirūpetyādi
[Someone] objects: "How can it be included under inference when it is not produced by a three-featured mark?" [The author], establishing that it is produced by a three-featured mark, states [the following].