Mind Probe
From Jenny Everywhere Wiki
The Crew of the Copper-Colored Cupids' Cupid Intelligence Institute had access to Mind Probes as early as 1978. However, the devices were unable to detect that the minds of people who'd been hit by the Gang of the Green Gorilla's brainwashing rays had been tampered with, beyond the obvious fact that this was true given their now-staunch belief in the greenness of gorillas. (PROSE: The Green Gorillas (short story)