>>7753735>No it is not plausibleDude, Imperial methods are very, very far from perfect. Conditioning can fail.
>there was ry of a raven guard marine killings himself before he could be convinced by the tau.That's an example of the conditioning working yes. Now go and read Justicar Alaric's three books (Grey Knights, Dark Adeptus and Hammer of Daemons) for an example of a --Grey Knight-- were the conditioning utterly failed to suppress the GK's --Imagination-- thus allowing for an interesting story to develop. Which is kind of the point of the 40k universe.
