The first stage of Avāya (perceptual judgement), in which the nature of the substance (to be known) is comprehended on completion of the process of īhā (speculation).
īhaṇabhāvaniyattassa atthasarūvapaḍibodhabuddhassa ya paricchedamuppādaṃtassa āuṭṭaṇatā bhaṇṇati.
(Nandī 47 Cū p.36)