Grand Inquisitor Fulminarex said:
Did the infamous Mechanical Men of the Dark Age have minds similar to humans, enough to make them targets for corruption?
It's been noted in several instances that technology used during mankind's Golden Era channeled the Warp. In fact much of the technology restrained in the Imperium today that is of human origin pertains to the manipulation of the Warp. This would lead me to conclude that this practice was quite common in Mankind's hey day. As Psykers were proven to exist it would have seemed to the Men of that time that humanity was on the edge of psychic revolution. However as several enemies acolytes face in Dark Heresy prove, the manipulation of the Warp is always a two way affair. It might have started as "anomalies", and then later viruses created from data received from the Warp. Eventually those in charge would have been unable to act, their very technological base rebelling. Thus I conclude that Mankind's fall was due to this fatal oversight. They stared into the Abyss, sought to harness it's power, and were blinded by it's radiance.