The Avacchedakatanirukti, a supplement by Gadadhara Bhattacarya (circa 1604–1709) to the commentary Didhiti on the Tattva Cintamani written by the great philosopher Raghunatha Siromani (circa 1477–1547), deals with the interpretation of avacchedakatva, the individuality of invariable concomitance in inference (vyapti), elaborating upon Raghunatha Siromani’s treatment of the topic. In his own commentary, the Subodha, Prof. N.S. Ramanuja Tatacharya clarifies the most difficult portion of this sastric text, and renders it accessible by presenting it in simple and lucid language.