Although seldom mentioned in the secondary literature on Vais ́esika, ̇the cognitive category of ārṣajñāna (ṛṣi cognition) is accepted as a distinct category of vidyā (knowledge) within both early and later Vais ́es ̇ika texts. This article deals with how ārṣajñāna is conceptualized in Praśastapādabhāṣya (PBh), S ́r ̄ıdhara’s Nyāyakandalī (NK), and Vyomas ́iva’s Vyomavatī (Vy). The main focus lies on how ṛṣi cognition is treated in these texts and what terms are used in the process. I aim to clarify the analysis of ṛṣi cognition apparent in the above sources and outline the implications this might have for the somewhat grander objective of a mapping of the semantic landscape of cognition and knowledge in Vais ́esika texts. The categories ̇of yogic perception (yogipratyakṣa) and siddhic vision (siddhadarśana) are also treated since they are included within a shared discourse.