In the Babylon-5 episode, The Deconstruction of Falling Stars, a propaganda technician named Daniel makes up stories showing Delenn, Sheridan, Garibaldi, and Franklin as power-hungry megalomaniacs who use non-human races to harm humans.
Daniel makes holograms of Delenn, Sheridan, Garibaldi, and Franklin for propaganda. These holograms are based on historical data and recorded memories of the original crew, with the forged records overriding their personalities. Sheridan is programmed to make an impassioned speech about conquering Earth before soon-to-be massacred prisoners and Dr. Franklin is programmed to act out a scene showing him talking clinically about horrific experiments involving human children and alien organs. Before Garibaldi is reprogrammed, he stalls by getting Daniel to reveal his faction's plans to launch a sneak attack on civilian population centers as the start of an all-out war. Garibaldi, who is aware that he is a computer program, hacks into the computer network and broadcasts the conversation. Before Daniel can turn off the holograms, an alarm sounds, indicating an imminent missile attack. Daniel, knowing that pro-Alliance forces have launched their own attack, leaves moments before a nuclear explosion envelops the anti-Alliance base.
Why would Daniel believe Garibaldi? Since the holograms are made from stored memories, couldn't Daniel just search through the memories to determine if Garibaldi is lying?