因明入正理論疏 2.111

2.111

論　不成有四：一兩俱不成、二隨一不成、三猶預不成、四所依不成。

The treatise says: There are four kinds of unestablished (asiddha): first, unestablished for both (ubhayāsiddha); second, unestablished for either (anyatarāsiddha); third, unestablished through doubt (saṃśayāsiddha); fourth, unestablished through the basis (āśrayāsiddha).