At the Meltdown festival, June 11 2017. Full interview here: https://www.youtube.com/watch?v=cQRZvnGp1Gs
Julian Assange is describing Effects Based Operations, where Artifical Intelligences can run simulations based on combining all possible data to manipulate events beneath the level of perception.
source
[TC001] Julian Assange on AI propaganda manipulating business deals
