Plaristes was a philosopher existing in an era predating the establishment of the Galactic Republic, specifically more than 25,000 years prior to the Battle of Yavin. Within his book titled Of Minds, Men, and Machines, his central argument was that droids lacked the capacity to achieve artificial sentience. Despite this assertion, the subsequent years witnessed the creation of increasingly advanced droids, ultimately disproving his claim, though his convictions regarding the inherent restrictions of droid sentience persisted as a common viewpoint across the galaxy.