Tattvachintamani is a treatise in Sanskrit authored by 14th-century CE Indian logician and philosopher Gangesa (fl.
There is a legend to the effect that Gangesa was completely illiterate while he was young and propitiated the goddess Kali on the cremation ground adjacent to his uncle's house, and acquired from her, as a boon, deep erudition in the science of Logic.
Varadhamana himself became a great scholar of nyaya and composed a commentary on Tattvacintāmaṇi named Tattvachintāmaṇi-prakasa and also several other works.
Broadly, Tattva-Chintāmaṇi is divided into four books dealing respectively with perception (pratyakṣha), inference (anumāna), comparison (upamāna) and verbal testimony (śabda).
The following references provide sources where one can find detailed accounts of the contents of Tattva-Chintāmaṇi.