I went through the brain simulator and went through kellogs memories. I got to the end where you can click on the TV to leave and when i got out it would not complete the quest. It still says "search through Kellogg's memories". I cannot go back into the simulator and i cannot speak to Valentine because all he says is "when you are ready sit down so we can begin". which is what he says before entering the simulator. I don't have a previous save.