In his Investigation of the Cognitive Support Dignāga takes up, as the title suggests, one of the specific issue debated by Vasubandhu in his Twenty Verses: what exactly should count as an object of cognition? Dignāga's definition of the cognitive support invokes the principle of the concomitance of cause and effect (kāryakāraṇabhāva). Thus, for an object to count as a support (ālambana) for cognitive awareness it must (i) produce a cognition, and (ii) that cognition must take the form of the ob